Byung Chul Jee

Seoul National University Bundang Hospital, Sŏul, Seoul, South Korea

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Publications (140)207.81 Total impact

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    ABSTRACT: The aim of this work was to evaluate nuclear histone acetylation level and total histone acetyltransferase (HAT) and deacetylase (HDAC) activity in ejaculated sperm and their relevance to conventional sperm parameters.
    Yonsei medical journal. 09/2014; 55(5):1333-40.
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    ABSTRACT: Our aim was to investigate whether celecoxib, a cyclooxygenase 2 (COX-2) inhibitor, decreases the in vitro proliferation of leiomyoma cells if the inflammatory pathway is blocked. Menstruation is an inflammation of uterus that produces cytokines and prostanoids, but the inflammatory mechanism underlying the growth of leiomyoma remains unexplained. Using in vitro cultures of leiomyoma cells obtained from 5 patients who underwent hysterectomy, cell proliferation, inflammatory signaling, transcription factors, growth factors, and extracellular matrix were examined by (4,5-dimethylthiaxol-2-yi)-2,5-diphenyltetraxolium bromide assay, immunoblotting, and quantitative polymerase chain reaction. Prostaglandin E2 was used to induce menstruation-like condition in the cells. We found that celecoxib inhibited COX-2 through the expression of nuclear factor κB in the cells. Celcoxib also decreased the gene expression of interleukin 6, tumor necrosis factor α, collagen A, fibronectin, platelet-derived growth factor, epidermal growth factor, and transforming growth factor β. In conclusion, the present study indicated that celecoxib could inhibit leiomyoma cell proliferation through blocking the inflammatory pathway that is probably one of the mechanisms underlying its pathogenesis.
    Reproductive sciences (Thousand Oaks, Calif.) 07/2014; · 2.31 Impact Factor
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    ABSTRACT: To estimate the incidence of, and identify risk factors for, spontaneous expulsion of the levonorgestrel-releasing intrauterine system (LNG-IUS). Pre-insertion characteristics for 481 women who received the LNG-IUS at a single institution in the Republic of Korea between 2003 and 2011 were analyzed retrospectively. The median duration of follow-up was 13.4months. Kaplan-Meier plots were constructed to estimate the time to occurrence of spontaneous expulsion in multiple subgroups. The overall crude incidence of spontaneous LNG-IUS expulsion was 9.6%. The cumulative incidence was 7.9%, 9.1%, and 9.6% at 1, 2, and 3years, respectively. It was significantly higher in women with adenomyosis (9.1%, 10.6%, and 11.1%) or uterine leiomyoma (14.5%, 15.8%, and 15.8%) than in those with a normal uterus (3.6%, 4.1%, and 4.6%) (P=0.008). Women with heavy menstrual bleeding (11.0%, 12.7%, and 13.4%), dysmenorrhea (8.1%, 9.0%, and 10.0%), or pre-insertion receipt of gonadotropin-releasing hormone agonists (13.3%, 16.0%, and 17.3%) also had higher cumulative incidences than those without these conditions (P<0.05). Most (84.5%) women with a spontaneous expulsion chose to discontinue the device. Clinicians need to be aware of the risk factors for spontaneous LNG-IUS expulsion because this can lead to a discontinuation of its use.
    International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics 04/2014; · 1.41 Impact Factor
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    ABSTRACT: To investigate the association of individual follicular fluid (FF) leptin and adiponectin levels with the quality of the corresponding oocyte and embryo. We prospectively enrolled 67 women who underwent controlled ovarian hyperstimulation with 89 FF samples. FF and the corresponding oocyte was obtained from a single dominant preovulatory follicle at the time of oocyte retrieval. Concentrations of leptin and adiponectin were measured by enzyme-linked immunosorbent assay in an individual follicle. The oocyte quality, fertilization rate, and corresponding embryo development were assessed. The FF level of leptin was significantly associated with body mass index (r=0.334, p<0.01). The FF adiponectin level was significantly higher in the normal fertilization group than the abnormal fertilization group (p=0.009) in the non-obese women. A lower FF leptin level was associated with a trend toward mature oocytes, normal fertilization, and good embryo quality, although these relationships were not statistically significant. The leptin:adiponectin ratio of FF did not differ significantly according to oocyte and embryo quality. The quality of the oocyte and embryo was not associated with the FF leptin level tertile. However, the normal fertilization rate was positively associated with FF adiponectin level tertile. There was a trend towards improved oocytes and normal fertilization rates with the lowest tertile of the FF leptin:adiponectin ratio, but this difference was not statistically significant. Our results suggest that a high FF adiponectin concentration could be a predictor of normal fertilization. However, the FF leptin concentration and leptin:adiponectin ratio is not significantly related to oocyte maturity and corresponding embryo development.
    Clinical and experimental reproductive medicine. 03/2014; 41(1):21-8.
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    ABSTRACT: The study aimed to investigate the effect of imatinib coadministration on in vitro oocyte acquisition and subsequent embryo development in cyclophosphamide (Cp)-treated mice. Female BDF1 mice were injected with 5 IU equine chorionic gonadotropin (eCG) followed by 5 IU human chorionic gonadotropin 48 hours later and then oocytes were retrieved 14 hours later. Twenty-four hours prior to eCG administration, 25, 50, or 75 mg/kg Cp with or without 7.5 mg/kg imatinib was injected. In the 25 and 50 mg/kg Cp groups, imatinib coadministration significantly enhanced the percentage of mature oocytes (+16.4% and +10.4%) and significantly decreased the percentage of dead oocytes (-25.9% and -15.3%). Imatinib coadministration significantly enhanced the fertilization rate (FR) in the 50 mg/kg Cp group (+12.2%). Intraoocyte spindle integrity was significantly affected by Cp and was rescued by imatinib coadministration. Coadministration of imatinib prior to ovarian stimulation has the benefit of enhancing oocyte maturity and the in vitro FR in Cp-treated mice .
    Reproductive sciences (Thousand Oaks, Calif.) 01/2014; · 2.31 Impact Factor
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    ABSTRACT: Objective To determine whether intracytoplasmic sperm injection (ICSI) could prevent total fertilization failure (TFF) and enhance the embryo quality in patients with non-male factor infertility. Study Design Two hundred and ninety-six in vitro fertilization (IVF) cycles performed in patients with non-male factor infertility between April 2009 and March 2013 were included in this retrospective study. During the period, ICSI and conventional IVF were performed in 142 and 154 cycles, respectively. The usual indications for ICSI were in the cycles of patients with 1) known low fertilization rate, 2) repetitive implantation failure, 3) advanced maternal age, 4) presence of endometrioma, 5) low oocyte yield (number of oocytes ≤3), or 6) poor quality oocytes. The rate of TFF, normal fertilization, abnormal pronuclei (PN) formation, embryo quality, and pregnancy outcomes between the patients treated with ICSI and conventional IVF cycles were compared. Results The patients treated with ICSI (ICSI group, n = 142) presented fewer number of oocytes than patients treated with conventional IVF cycles (n = 154). The TFF rate was not different (4.2% vs. 0.6%, P = 0.059), but the ICSI group presented a significantly higher rate of normal fertilization (83.4% vs. 79.1%, P = 0.04) and lower rate of abnormal PN formation (3.9% vs. 13.3%, P < 0.01). The cleavage stage embryo quality was better in the ICSI group (grade A: 31.1% vs. 21.3%, P = 0.001; grade A + B: 65.1% vs. 47.6%, P < 0.001). Conclusion The result of this study does not support the use of ICSI to prevent TFF in patients with non-male factor infertility. However, ICSI improved the fertilization rate and the embryo quality.
    European journal of obstetrics, gynecology, and reproductive biology 01/2014; · 1.97 Impact Factor
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    ABSTRACT: Objective To investigate the effects of necrostatin-1 (Nec-1) supplementation on vitrification, warming and transplantation of ovarian tissue. Study design Ovaries from 4-week-old ICR mice were vitrified using a two-step procedure; ovaries were suspended in equilibration solution for 10 min, and then mixed with vitrification solution for 5 min. Ovaries were divided at random into three groups and 0 (control), 25 or 100 μM Nec-1 was added to the vitrification solution. After warming, follicular morphology and apoptosis were assessed. For each group, a sample of vitrified, warmed ovaries was autotransplanted. The same dose of Nec-1 that was added to the vitrification solution was added to each warming solution and injected intraperitoneally. Follicular morphology and apoptosis of transplanted ovaries were assessed after 2 weeks. Results After vitrification and warming, morphological analysis revealed that the intact follicle ratio was significantly higher in the Nec-1-treated groups compared with the control group (control, 45.1%; 25 μM Nec-1, 51.7%; 100 μM Nec-1, 57.9%). The rate of apoptosis was lower in the Nec-1 treated groups compared with the control group (control, 11.2%; 25 μM Nec-1, 8.5%; 100 μM Nec-1, 7.2%). After transplantation of the vitrified, warmed ovaries, morphological analysis revealed that the intact follicle ratio was significantly higher in the Nec-1 treated groups compared with the control group (control, 43.1%; 25 μM Nec-1, 60.6%; 100 μM Nec-1, 70.7%). The rate of apoptosis was lower in the Nec-1 treated groups compared with the control group (control, 5.3%; 25 μM Nec-1, 2.5%; 100 μM Nec-1, 2.0%). Conclusions Nec-1 supplementation during vitrification, warming and transplantation has beneficial effects on the survival of ovarian tissue. These results can help to improve ovarian tissue vitrification and transplantation protocols for fertility preservation.
    European Journal of Obstetrics & Gynecology and Reproductive Biology. 01/2014;
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    ABSTRACT: Objective To study variations in semen parameters among cancer patients who visited a sperm banking clinic before undergoing cancer treatment. Design Retrospective, consecutive study. Setting University-based hospital. Patient(s) Eighty-six patients, diagnosed with various cancers, undergoing multiple semen collections on 5 consecutive days, for fertility preservation, between 2004 and 2013. Intervention(s) None. Main Outcome Measures Within- and between-subject coefficients of variation were estimated using a random-effects analysis of variance to assess the consistency of semen parameters (volume, sperm concentration, motility, rapid motility, total motile sperm count, and computer-based sperm parameters), whereas intraclass correlation coefficients (ICCs) were calculated to assess the size of the between-component of variance relative to the total component of variance. Result(s) When analyzing semen parameters over a maximum of 5 consecutive days, only the semen volume was significantly reduced in day-1 and -3 samples compared with the first sample. Almost all of the parameters showed high ICC values, suggesting that within-subject fluctuations were small relative to the between-subject variability. The highest ICC values were noted in volume (ICC 0.76; 95% confidence interval [CI] 0.52–0.89), followed by total motile count (ICC 0.71; 95% CI 0.30–0.89); the least consistent measure was wobble (ICC 0.14; 95% CI −0.13, 0.51). Conclusion(s) Repeated ejaculates from cancer patients did not show substantial variation in semen quality.
    Fertility and Sterility. 01/2014;
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    ABSTRACT: To evaluate the vertical distance between umbilicus to aortic bifurcation on coronal view in Korean women and their relation with body mass index (BMI) and woman's age. This retrospective study included 257 women who visited emergency center at university-based hospital from January to December 2011. All women underwent abdomino-pelvic computerized tomography (CT) due to various symptoms in a supine position. By using the electronic coronal CT images, the vertical distance between umbilicus and aortic bifurcation was measured. If aortic bifurcation was located below umbilicus, the distance was expressed as minus value (i.e., caudal to umbilicus). Age of woman, body weight, height and calculated BMI (kg/m(2)) were also recorded. Aortic bifurcation was located caudal to umbilicus in 52.9% and cephalad to umbilicus in 37.4%. The vertical distance had a negative relationship with BMI (r=.0.180, P=0.004), as well as woman's age (r=-0.382, P<0.001). However, a multivariate analysis revealed that the vertical distance had a significant negative relationship with woman's age (P<0.001) but not with BMI (P=0.510). An equation could be drawn to estimate the vertical distance by using woman's age and BMI: vertical distance (mm)=12.6-0.3×(age)-0.2×(BMI). The vertical distance from umbilicus to aortic bifurcation on coronal view showed a significant inverse correlation with woman's age, however, the distances varied widely. Most older or obese Korean women had aortic bifurcation caudal to umbilicus.
    Obstetrics & gynecology science. 01/2014; 57(1):44-9.
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    ABSTRACT: Objective : To estimate the incidence of, and identify risk factors for, spontaneous expulsion of the levonorgestrel-releasing intrauterine system (LNG-IUS). Methods : Pre-insertion characteristics for 481 women who received the LNG-IUS at a single institution in the Republic of Korea between 2003 and 2011 were analyzed retrospectively. The median duration of follow-up was 13.4 months. Kaplan–Meier plots were constructed to estimate the time to occurrence of spontaneous expulsion in multiple subgroups. Results : The overall crude incidence of spontaneous LNG-IUS expulsion was 9.6%. The cumulative incidence was 7.9%, 9.1%, and 9.6% at 1, 2, and 3 years, respectively. It was significantly higher in women with adenomyosis (9.1%, 10.6%, and 11.1%) or uterine leiomyoma (14.5%, 15.8%, and 15.8%) than in those with a normal uterus (3.6%, 4.1%, and 4.6%) (P = 0.008). Women with heavy menstrual bleeding (11.0%, 12.7%, and 13.4%), dysmenorrhea (8.1%, 9.0%, and 10.0%), or pre-insertion receipt of gonadotropin-releasing hormone agonists (13.3%, 16.0%, and 17.3%) also had higher cumulative incidences than those without these conditions (P < 0.05). Most (84.5%) women with a spontaneous expulsion chose to discontinue the device. Conclusion : Clinicians need to be aware of the risk factors for spontaneous LNG-IUS expulsion because this can lead to a discontinuation of its use.
    International Journal of Gynecology & Obstetrics. 01/2014;
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    ABSTRACT: What is the optimal vitrification protocol according to the cryoprotective agent (CPA) for ovarian tissue (OT) cryopreservation? The two-step protocol with 7.5% ethylene glycol (EG) and 7.5% dimethyl sulfoxide (DMSO) for 10 min then 20% EG, 20% DMSO and 0.5 M sucrose for 5 min showed the best results in mouse OT vitrification. Establishing the optimal cryopreservation protocol is one of the most important steps to improve OT survival. However, only a few studies have compared vitrification protocols with different CPAs and investigated the effect of in vitro culture (IVC) on vitrified-warmed OT survival. Some recent papers proposed that a combination of CPAs has less toxicity than one type of CPA. However, the efficacy of different types and concentrations of CPA are not yet well documented. A total of 644 ovaries were collected from 4-week-old BDF1 mice, of which 571 ovaries were randomly assigned to 8 groups and vitrified using different protocols according to CPA composition and the remaining 73 ovaries were used as controls. After warming, each of the eight groups of ovaries was further randomly divided into four subgroups and in vitro cultured for 0, 0.5, 2 and 4 h, respectively. Ovaries of the best two groups among the eight groups were autotransplanted after IVC. The CPA solutions for the eight groups were composed of EDS, ES, ED, EPS, EF, EFS, E and EP, respectively (E, EG; D, DMSO; P, propanediol; S, sucrose; F, Ficoll). The IVC medium was composed of α-minimal essential medium, 10% fetal bovine serum and 10 mIU/ml follicle-stimulating hormone (FSH). Autotransplantation of vitrified-warmed OTs after IVC (0 to 4 h) using the EDS or ES protocol was performed, and the grafts were recovered after 3 weeks. Ovarian follicles were assessed for morphology, apoptosis, proliferation and FSH level. The percentages of the morphologically intact (G1) and apoptotic follicles in each group at 0, 0.5, 2 and 4 h of IVC were compared. For G1 follicles at 0 and 4 h of IVC, the EDS group showed the best results at 63.8 and 46.6%, respectively, whereas the EP group showed the worst results at 42.2 and 12.8%, respectively. The apoptotic follicle ratio was lowest in the EDS group at 0 h (8.1%) and 0.5 h (12.7%) of IVC. All of the eight groups showed significant decreases in G1 follicles and increases in apoptotic follicles as IVC duration progressed. After autotransplantation, the EDS 0 h group showed a significantly higher G1 percentage (84.9%) than did the other groups (42.4-58.8%), while only the ES 4 h group showed a significant decrease in the number of proliferative cells (80.6%, 87.6-92.9%). However, no significant differences in apoptotic rates and FSH levels were observed between the groups after autotransplantation. The limitation of this study was the absence of in vitro fertilization using oocytes obtained from OT grafts, which should be performed to confirm the outcomes of ovarian cryopreservation and transplantation. We compared eight vitrification protocols according to CPA composition and found the EDS protocol to be the optimal method among them. The data presented herein will help improve OT cryopreservation protocols for humans or other animals. This study was supported by a grant (No. A120080) from the Korea Healthcare Technology R&D Project, Ministry of Health & Welfare, Republic of Korea.
    Human Reproduction 12/2013; · 4.67 Impact Factor
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    ABSTRACT: To compare the mouse oocyte vitrification outcomes of the CryoLogic vitrification method (CVM) and the conventional open method using a Cryotop. Two CVM methods (original CVM and modified CVM) were tested. Mature oocytes obtained from female BDF-1 mice were vitrified by two-step exposure to equilibrium and vitrification solutions. Three vitrification protocols were tested on three groups: the CVM-kit, modified CVM, and Cryotop groups. After exposure to the two solutions, the oocytes were vitrified. After warming, the oocytes were fertilized in vitro, and the embryo development was assessed. Blastomeres positive for caspase were counted using an in situ assay kit. The spindle morphology and chromosome configurations of warmed vitrified oocytes were also assessed. The modified CVM and Cryotop groups showed similar developmental capacities, and similar proportions of cells with intact spindles and chromosome configurations. The modified CVM protocol was superior to the original CVM protocol for developmental competence and intact spindle preservation. However, the CVM group showed a relatively higher number of apoptotic cells in blastocysts. Closed vitrification using the modified CVM protocol may be used as an alternative to the conventional open method, but strategies to decrease apoptosis in the blastomere need to be investigated.
    Clinical and experimental reproductive medicine. 12/2013; 40(4):148-54.
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    ABSTRACT: Does exposure to lysophosphatidic acid (LPA) during in vitro maturation (IVM) enhance the maturation and developmental competence of mouse oocytes? Supplementation of IVM medium with 30 μM LPA enhanced the developmental competence of in vitro matured oocytes and so made them more comparable to in vivo matured control oocytes. LPA is a small phospholipid that acts as an extracellular signaling molecule by binding to and activating at least five G protein-coupled receptors. LPA has various biological actions, with both developmental and physiological effects. During IVM, LPA at six different doses (0, 1, 10, 30, 50 or 100 μM) was added into the TCM-199 medium. After maturation, the developmental competence and other parameters of the oocytes were assessed. Immature GV stage oocytes from 5- to 6-week-old female BDF-1 mice were incubated for 17-18 h in IVM medium containing 0, 1, 10 or 30 μM LPA and then either fertilized in vitro with epididymal sperm, or assessed for spindle morphology, mitochondrial membrane potential (ΔΨm) or the mRNA expression of a meiotic checkpoint gene (Mad2), a microtubule structure gene (Hook1), two maternally derived genes (Mater and Hsf1) and an apoptosis-related gene (Caspase6). The fertilized embryos were grown in vitro to assess blastocyst-formation rates, differential cell counts and apoptosis. Rates of maturation, fertilization and blastocyst formation and hatching were significantly higher in the 30 μM LPA-supplemented group (94.3, 96.3, 79.1 and 51.3%, respectively) than in the unsupplemented control (0 μM) group (80.5, 87.5, 61.3 and 37.8%, respectively) and more comparable to that of the in vivo matured oocytes (100, 96.5, 95.3 and 92.9%, respectively). LPA did not adversely affect mitochondrial activity, spindle integrity, blastocyst cell number, caspase positivity or Mad2 expression. Oocytes matured in 30 μM LPA had reduced Caspase6 expression, but Hook1, Mater and Hsf1 were up-regulated in all of the LPA-supplemented groups. Chromosomal aneuploidy in the resultant blastocysts and the production of normal pups were not assessed. Only mouse oocytes were assessed. Supplementation of IVM medium with 30 μM LPA may enhance the developmental competence of mouse oocytes without affecting apoptosis, spindle normalcy or mitochondrial integrity. This study was supported by a research grant (02-2012-021) from the Seoul National University Bundang Hospital. The authors declare that they have no competing interests.
    Human Reproduction 11/2013; · 4.67 Impact Factor
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    ABSTRACT: To compare the pregnancy-related complications after laparoscopic and laparotomic uterine myomectomy. A retrospective study of 415 women who received laparoscopic (n = 340) or laparotomic (n = 75) resection of uterine leiomyomas in one center. The mean follow-up period was 26.5 months in laparoscopic group and 23.9 months in laparotomic group. Fifty-four and 12 pregnancies occurred in laparoscopic and laparotomic myomectomy group, respectively. The major obstetric outcomes were similar between two groups. There was no ectopic pregnancy or preterm birth. There were two cases of obstetric complication in laparoscopic group only; one experienced neonatal death and postpartum hemorrhage due to placental abruption and the other underwent subtotal hysterectomy due to uterine dehiscence identified during Cesarean section. Uterine rupture or dehiscence after laparoscopic myomectomy occurred in 3.7% (2/54) which lead to unfavorable outcome. Appropriate selection of patients and secure suture techniques appears to be important for laparotomic myomectomy in reproductive-aged women.
    Obstetrics & gynecology science. 11/2013; 56(6):375-81.
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    ABSTRACT: To develop a nomogram for prediction of ongoing pregnancy after in vitro fertilization (IVF)-embryo transfer (ET) using age of women and serum biomarkers. Prospective longitudinal study of 103 patients undergoing IVF-ET at a university-based hospital. Serum HCG and progesterone levels were measured at the time of the pregnancy test (14 days after oocyte retrieval) and pregnancy outcomes were followed. The main outcome was ongoing pregnancy prediction. For the prediction of ongoing pregnancy, a combination of serum HCG, progesterone and age of the woman shows the best predictive accuracy (AUC 0.912 [95% CI 0.815-1.000], sensitivity 89.3%, specificity 80.0%, positive predictive value 89.3%, negative predictive value 80.0%). On the basis of these variables, we developed a nomogram to predict ongoing pregnancy. A nomogram could help to predict ongoing pregnancy after IVF-ET. The nomogram needs further validation to improve individualized prediction of ongoing pregnancy.
    European journal of obstetrics, gynecology, and reproductive biology 10/2013; · 1.97 Impact Factor
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    ABSTRACT: To evaluate the safety and feasibility of single-port laparoscopic adnexal surgery during pregnancy. A retrospective study (Canadian Task Force Classification III). A university hospital. A total of 14 women with intrauterine pregnancy who underwent single-port laparoscopic surgery (SPLS). We retrospectively reviewed the medical records of 14 women with intrauterine pregnancy who underwent SPLS between November 2009 and September 2012 for the treatment of an adnexal mass. Factors investigated included the duration of surgery, differences between preoperative and postoperative hemoglobin, the size of the mass as measured by ultrasonography, major intraoperative or postoperative complications, conversion to multiport laparoscopy, and pregnancy outcomes. Single-port laparoscopic adnexal surgery was successfully performed in all 14 pregnant patients with an adnexal mass. The median gestational age at operation was 9 weeks (range, 4 weeks-17 weeks 4 days). Procedures included ovarian cystectomy with or without detorsion (n = 9), cyst aspiration with detorsion (n = 2), salpingectomy (n = 2), and salpingostomy (n = 1). The median duration of surgery was 59 minutes (range, 36-84 minutes). No major intraoperative or postoperative complications were encountered, and there was no need for conversion to multiport laparoscopic surgery. Five women had spontaneous vaginal delivery, and 5 women underwent cesarean delivery at term. One woman had preterm delivery at a gestational age of 24 weeks 5 days. In 1 case, abortion occurred 2 weeks after the operation. Based on these initial findings, SPLS appears to be a safe and technically feasible treatment for an adnexal mass during pregnancy.
    Journal of Minimally Invasive Gynecology 07/2013; · 1.61 Impact Factor
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    ABSTRACT: Purpose: To investigate whether preoperative serum anti-mullerian hormone (AMH) levels are lower in women with ovarian endometrioma and in women with mature cystic teratoma of the ovaries. Materials and Methods: In a tertiary university hospital, a retrospective case-control study was performed. Serum AMH levels between an advanced (stage III and IV) endometrioma group (n=102) and an age- and body mass index (BMI)-matched control group were compared. Serum AMH levels between an ovarian mature cystic teratoma group (n=48) and age- and BMI-matched controls were also compared. Results: Absolute serum AMH and multiples of the median for AMH (AMH-MoM) relevant to Korean standards were lower in the endometrioma group than controls, but this was not statistically significant (mean±SEM, 2.9±0.3 ng/mL vs. 3.3±0.3 ng/mL, p=0.28 and 1.3±0.1 vs. 1.6±0.1, p=0.29, respectively). Specifically, the stage IV endometriosis group (n=51) exhibited significantly lower serum AMH and AMH-MoM (2.1±0.3 vs. 3.1±0.4 ng/mL, p=0.02 and 1.1±0.1 vs. 1.7±0.2, p=0.03, respectively). Serum AMH and AMH-MoM levels were similar between stage III endometriosis and controls (3.7±0.5 vs. 3.4±0.5 ng/mL and 1.6±0.2 vs. 1.5±0.2, respectively), as well as between the mature cystic teratoma group and controls (4.0±0.5 ng/mL vs. 4.0±0.5 ng/mL and 1.6±0.2 vs. 1.6±0.3, respectively). Interestingly, AMH-MoM level was negatively correlated with endometriosis score with statistical significance (r²=0.13, p<0.01). Conclusion: In women with advanced ovarian endometrioma, preoperative serum AMH values tended to be lower than those for age and BMI-matched controls. Notably, stage IV endometrioma appeared to be closely associated with decreased ovarian reserve, even before operation. Clinicians should keep this information in mind before undertaking surgery of ovarian endometrioma.
    Yonsei medical journal 07/2013; 54(4):921-926. · 0.77 Impact Factor
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    ABSTRACT: To investigate outcomes of stimulated IVF cycles in which GnRH antagonist was omitted on the ovulation triggering day. A total of 86 women who underwent controlled ovarian hyperstimulation with recombinant FSH and GnRH antagonist flexible multiple-dose protocols were recruited and prospectively randomized into the conventional group (group A) or cessation group (group B). The GnRH antagonist, 0.25 mg/day of cetrorelix, was started when the leading follicle reached 14 mm in diameter and was continuously administered until the hCG triggering day (group A, 43 cycles) or until the day before hCG administration (group B, 43 cycles). The maturity of oocytes, fertilization rate, embryo quality, and implantation and clinical pregnancy rates were evaluated. The duration of ovarian stimulation, total dose of gonadotropins, serum estradiol levels on hCG administration day, and number of oocytes retrieved were not significantly different between the two groups. The total dose of GnRH antagonist was significantly lower in group B than group A (2.5±0.9 vs. 3.2±0.8 ampoules, p<0.05). There was no premature luteinization in any of the subjects. The proportion of mature oocytes and fertilization rate were not significantly different in group B than group A (70.7% vs. 66.7%; 71.1% vs. 66.4%, respectively). There were no significant differences in the implantation or clinical pregnancy rates. Our prospective randomized study suggested that cessation of GnRH antagonist on the hCG administration day during a flexible multiple-dose protocol could reduce the total dose of GnRH antagonist without compromising its effects on pregnancy rates.
    Clinical and experimental reproductive medicine. 06/2013; 40(2):83-9.
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    ABSTRACT: To evaluate the correlation between serum levels of anti-Müllerian hormone (AMH) and ovarian response to mild stimulation in normoovulatory women and anovulatory women with polycystic ovary syndrome (PCOS). Seventy-four cycles of mild stimulation (clomiphene citrate+gonadotropin followed by timed intercourse or intrauterine insemination) performed in normoovulatory women (57 cycles) and anovulatory women with PCOS (17 cycles). Ovarian sensitivity was defined by the number of mature follicles (≥14 mm) on triggering day per 100 IU of gonadotropin. A correlation between ovarian sensitivity and the baseline serum AMH level (absolute or multiples of the median [MoM] value for each corresponding age) was calculated. Correlation between ovarian response and serum AMH level was evaluated. Ovarian sensitivity to mild stimulation was positively correlated with absolute serum AMH (r=0.535, p<0.001) or AMH-MoM value (r=0.390, p=0.003) in normoovulatory women, but this correlation was not observed in anovulatory women with PCOS (r=0.105, p>0.05, r=-0.265, p>0.05, respectively). Ovarian response to mild stimulation is possibly predicted by the serum AMH level in normoovulatory women, but not in anovulatory women with PCOS.
    Clinical and experimental reproductive medicine. 06/2013; 40(2):95-9.
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    ABSTRACT: OBJECTIVE: To investigate the relationship between the number of CGG repeats in the fragile X mental retardation 1 (FMR1) gene and serum levels of anti-Müllerian hormone (AMH) in Korean infertility patients without premutation. STUDY DESIGN: A retrospective study of 228 infertile women who received fertility treatment in a single private in vitro fertilization (IVF) clinic from May 2010 to August 2012 was performed. Serum FSH and AMH were measured on menstrual day 3 and the number of CGG repeats was evaluated. RESULTS: The mean age of the study population was 33.3±3.8 years. No significant correlation was observed between CGG repeat count in both alleles and the serum FSH, AMH or multiples of median (MoM) of AMH in whole study subjects. In women with age ≥35 years, however, there was an increasing tendency in the MoM of AMH with increasing number of CGG repeats in allele 2 (R(2)=0.075, p=0.008). This correlation was not observed in patients aged less than 35 years. CONCLUSION: We observed a positive correlation between MoM of AMH and number of CGG repeats in allele 2 in women aged over 35 years. Our findings are discordant with other reports, and therefore further studies are needed to determine whether this discrepancy is due to ethnic differences.
    European journal of obstetrics, gynecology, and reproductive biology 05/2013; · 1.97 Impact Factor

Publication Stats

625 Citations
207.81 Total Impact Points

Institutions

  • 2003–2014
    • Seoul National University Bundang Hospital
      • Department of Obstetrics and gynecology
      Sŏul, Seoul, South Korea
  • 2012–2013
    • Hamchoon Women's Clinic
      Sŏul, Seoul, South Korea
  • 2006–2013
    • Seoul National University Hospital
      • Department of Obstetrics and Gynecology
      Seoul, Seoul, South Korea
  • 2008–2011
    • Yonsei University Hospital
      • Department of Internal Medicine
      Sŏul, Seoul, South Korea
  • 1999–2011
    • Seoul National University
      • Department of Obstetrics and Gynecology
      Seoul, Seoul, South Korea
  • 2002
    • Jeju National University
      Tse-tsiu, Jeju, South Korea