Richard C Henshaw

University of Adelaide, Adelaide, South Australia, Australia

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Publications (3)9.94 Total impact

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    ABSTRACT: The increasing prevalence of obesity in women of child-bearing age is of growing concern in the health community. Obesity is associated with sub-optimal reproductive performance; therefore, it is understandable that the number of young women with elevated body mass index (BMI) accessing assisted reproductive treatment (ART) is on the rise. Consequently, this study not only assessed the impact of BMI on fertilisation rates, embryo development and freezing during ART in women aged ≤38 years but also determined their subsequent pregnancy and delivery rates. Data were retrospectively analysed from all cycles initiated in 2006/2007 for women aged ≤38 years. The BMI categorisations were as follows: normal - 18.5-24.9 kg/m(2) ; overweight - 25-29.9 kg/m(2) ; obese - 30-34.9 kg/m(2) ; morbidly obese class I - 35-39.9 kg/m(2) ; morbidly obese class П -≥40 kg/m(2) . Obese and morbidly obese women required a significantly higher follicle stimulating hormone start dose than normal BMI women; however, they obtained significantly fewer oocytes (P < 0.05). Although BMI did not affect embryo development, morbidly obese class Π women had significantly reduced pregnancy rates compared to normal BMI women (30.5 vs 41.7%, respectively; P < 0.05). Furthermore, increasing BMI was positively correlated to increasing rates of preterm delivery (P < 0.05). Increasing BMI was also positively correlated to increasing delivery rates of singleton term macrosomic offspring (≥4000 g). Obesity in women aged≤38 years does not affect embryo development; however, it does reduce clinical pregnancy rates in women with a BMI≥40 and increases rates of preterm labour and delivery of macrosomic offspring.
    Australian and New Zealand Journal of Obstetrics and Gynaecology 06/2012; 52(3):270-6. · 1.30 Impact Factor
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    ABSTRACT: To determine the relationship between paternal body mass index (BMI), embryo development and pregnancy, and live birth outcomes after assisted reproductive technology (ART). Retrospective analysis of ART cycles. Major assisted reproduction center. Three hundred five couples undergoing ART in a private fertility clinic. No intervention was undertaken in patients involved in this study. Live birth outcomes and clinical pregnancy rates. No significant relationship between paternal BMI and early embryo development was found. However, increased paternal BMI was associated with decreased blastocyst development, clinical pregnancy rates and live birth outcomes. To our knowledge, this is the first report linking increased paternal BMI and clinical pregnancy and live birth rates after ART treatment. Further work to elucidate the mechanisms involved is required.
    Fertility and sterility 12/2010; 95(5):1700-4. · 3.97 Impact Factor
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    Deanne Feil, Richard C Henshaw, Michelle Lane
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    ABSTRACT: Single embryo transfers (SETs) require the most viable embryo from a cohort to be selected. Day 4 embryos may provide a selection advantage similar to blastocyst transfer as embryos are replaced post-embryonic genome activation and into the uterus where they would normally reside. However, there is currently no adequate morphological system to assess Day 4 embryos. Therefore, we developed an assessment system for Day 4 embryos and retrospectively assessed Day 4 SET success rates compared with Day 5 SETs. Embryos (n = 996 after IVF or ICSI) were assessed on Day 4 of development, prior to implementing Day 4 embryo transfers, to obtain a descriptive range of embryo morphologies observed at this time point. A morphological scoring system was developed from this. All patients having an SET after extended culture (Day 4, n = 124 or Day 5, n = 193), at Repromed, Adelaide, Australia, during June 2006-January 2007 were analysed for pregnancy outcome. Ongoing pregnancy was determined by fetal cardiac activity at 6-8 weeks after oocyte collection. Day 4 and 5 SETs resulted in similar ongoing pregnancy rates of 38.7% and 32.1%, respectively. A Day 4 scoring system was successfully developed and implemented. Day 4 SETs were found to be a viable option or alternative to Day 5 SETs with no difference in pregnancy rates.
    Human Reproduction 08/2008; 23(7):1505-10. · 4.67 Impact Factor

Publication Stats

41 Citations
9.94 Total Impact Points

Institutions

  • 2008–2012
    • University of Adelaide
      • Discipline of Obstetrics and Gynaecology
      Adelaide, South Australia, Australia