Tanja Tydén

Uppsala University | UU · Department of Women's and Children's Health

Objectives To investigate factors associated with multiple induced abortions. Materials and methods A multi-centre cross-sectional survey among abortion-seeking women (n = 623;14-47y) in Sweden, 2021. ‘Multiple abortions’ was defined as having had ≥2 induced abortions. This group was compared to women with a previous experience of 0-1 induced abor...

Objectives: To investigate women's decision-making on induced abortion. Materials and methods: A multi-centre cross-sectional survey among 623 abortion-seeking women in Sweden (2021). The perceived difficulty to decide on abortion was measured using a 7-point Likert scale, and analysed with univariate and multivariate analysis (odds ratios [OR],...

Introduction: It is unclear whether tobacco in early pregnancy and alcohol use preceding pregnancy are associated with spontaneous abortion. The purpose was to investigate if use of tobacco and/or alcohol is associated with spontaneous abortion among women attending antenatal care, and if age and body mass index (BMI) attenuate the risk. Material...

Objective To estimate the prevalence of contraceptive method use among women, assess concerns about hormonal contraception (HC) and copper intrauterine device (Cu-IUD) and determine characteristics associated with concerns of HC and Cu-IUD. Method Cross-sectional study. Swedish speaking women (n = 212) aged 16–50 attending midwives at four outpati...

The aim of this study was to investigate sexual behavior, contraceptive use, risk factors as well as sources of sex information among first-year high-school students in Sweden. Secondly, to assess differences between genders and study programs as well as changes over a 40-year period. A repeated cross-sectional survey was conducted in two cities. A...

Purpose The aim of this study was to investigate medical undergraduate students’ fertility awareness and parenthood intentions in three European countries, as well as possible differences across genders and countries. Materials and methods A cross sectional survey among 656 medical students in Sweden, Belgium and Greece. The utilised questionnaire...

Introduction: The Reproductive Life Plan (RLP) is a clinical tool to help clients find strategies to achieve their reproductive goals. Despite much research on the RLP from high-income countries, it has never been studied in low- or middle income countries. Together with health workers called Mentor Mothers (MMs), we used a context-adapted RLP in...

Unplanned pregnancies constitute a major health problem globally carrying negative social, economic and health consequences for individuals and families. In this study, we explored the underlying causes and implications of this phenomenon in Eswatini, a country with high rates of unplanned pregnancy. Three focus group discussions were conducted in...

Most previous studies about fertility knowledge and attitudes among men have been based on quantitative methods using questionnaires with fixed-choice response options. The aims of this qualitative study were to explore childless young men’s reflections on fertility and infertility through semi-structured interviews. Danish (n = 17) and Swedish (n...

In high-income countries, parental age at first birth has increased and this postponement increases the risk of involuntary childlessness or having fewer children than desired. This interview study was conducted in Denmark and Sweden among childless men (n = 29) in their last year of an education. The aim was to explore the role of individual and s...

Delayed childbearing is currently a major challenge in reproductive medicine as increased age has an important impact on successful conception, both in natural and in assisted reproduction. There is a lack of knowledge about the impact of age on fertility, even in highly educated populations. A number of initiatives have been taken to increase fert...

Objectives: The aims of the study were to investigate foreign-born women’s lifestyle and health before and during early pregnancy and compare them with those of Nordic-born women. Methods: Women recruited at antenatal clinics in Sweden answered a questionnaire in Swedish, English or Arabic or by telephone interview with an interpreter. Questions co...

Objectives: The aims of the study were to evaluate how well the reproductive life plan (RLP) tool was implemented in practice and explore the utility of the website www.reproduktivlivsplan.se for patient counselling. Methods: A cross-sectional study was conducted in 2018, in which 73 midwives in primary health care were asked to use the RLP tool an...

Background: Reproductive life plan counseling (RLPC) is a tool to encourage women and men to reflect upon their reproduction, to avoid unintended pregnancies and negative health behavior that can threaten reproduction. The aim was to evaluate the effect of RLPC among women attending contraceptive counseling. Outcomes were knowledge about fertility...

Introduction: There is evidence demonstrating that certain lifestyle factors have a detrimental effect on fertility. Since such factors often coexist, possible synergistic effects merit further investigation. Thus we aimed to examine the cumulative impact of lifestyle factors on in vitro fertilization (IVF) early reproductive treatment outcomes an...

Background: Despite reported high levels of contraception use in eSwatini, unplanned pregnancies are common. The aims of this study were to investigate prevalence and determinants of contraception use and unplanned pregnancies in a disadvantaged area in the Kingdom of eSwatini (Swaziland), and to investigate the association between unplanned pregn...

Introduction: The potential value of preconception care and interconception care is increasingly acknowledged, but delivery is generally uncommon. Reaching women for interconception care is potentially easier than for preconception care, however the concept is still unfamiliar. Expert consensus could facilitate guidelines, policies and subsequent i...

Background: Many men have limited knowledge about reproductive health and fertility. The aim of the study was to evaluate if Reproductive Life Plan (RLP)-based counselling during a sexual health visit could increase men’s fertility awareness. Material and methods: The study was a randomized controlled trial including 201 men aged 18–50 who visited...

This study investigates boys’ awareness and thoughts about human papillomavirus (HPV) and HPV vaccination, perceived benefits of vaccinating men, information sources and intention to be vaccinated against HPV. We used a qualitative approach and interviews were conducted with 31 upper secondary school male students. Two main themes 1) Promotion of e...

Background: The aims of this longitudinal study were to identify predictors for continued pornography consumption and to investigate pornography consumption in relation to psychosomatic and depressive symptoms among a group of adolescents in Sweden. Methods and materials: A longitudinal study in classroom environment in 53 randomly selected senior...

Introduction: Limited attention has been paid to the use of contraception in relation to women's family planning intentions. The aim of this study was to investigate the use of contraception during the most recent intercourse as well as the reproductive intentions of Swedish speaking women requesting contraceptive counseling. Material and methods...

Introduction: Many women and men lack knowledge about fertility, including timing of the fertile window, age-related decline, and lifestyle factors that may impair fertility. The Internet has become an important source of information, but evidence-based information on fertility and reproduction in Swedish on the Internet is limited. The present stu...

[This corrects the article DOI: 10.1371/journal.pone.0193054.].

Thailand has one of the world’s highest prevalence of cervical cancer, mainly caused by the human papillomavirus (HPV). HPV infections can successfully be prevented by vaccination, which is available at a cost but not yet implemented in the national vaccination program. Parents play a critical role in deciding whether to vaccinate their child again...

Introduction: Adverse childhood experiences (ACE) result in somatic and mental health disturbances. Its influence on antenatal depression is scarcely studied. This study examined the association between experience of ACE and antenatal depressive symptomatology. Material and methods: 1257 women from 172 antenatal clinics in Sweden were surveyed d...

Background: The aim of the study was to investigate if expecting parents wanted to know the sex of the fetus during ultrasound examination and if they had discussed it with the midwife. Another aim was to explore any interest in sex selection. Methods: A longitudinal survey in early and late pregnancy among 2393 women in Sweden. Results: Almost all...

In 2012, human papillomavirus (HPV) vaccination was introduced free of charge in the Swedish national school-based vaccination programme for 10-12-year-old girls, and as catch-up vaccination for young women. In Sweden, there is an ongoing discussion about including boys in the national vaccination programme. Few studies are undertaken about adolesc...

A randomized controlled trial was conducted between 2015 and 2016. Women (n = 6354), who attended 86 midwives at 28 clinics for contraceptive counseling, were assessed for eligibility. Main outcome measures were knowledge of fertility and reproductive Health.

Background: Infertility has been associated with psychological distress, but whether these symptoms persist after achieving pregnancy via assisted reproductive technology (ART) remains unclear. We compared the prevalence of anxiety and depressive symptoms between women seeking for infertility treatment and women who conceived after ART or naturall...

Introduction: Research about pregnancy-planning behaviour mostly focuses on women, even though pregnancy planning usually also concerns men. The purpose of this study was to investigate how men plan for family, and to measure their fertility knowledge after having become fathers. Material and methods: Data were collected in 2014 as part of a Swe...

The aim was to investigate school nurses’ attitudes towards, and experiences of vaccination against human papillomavirus (HPV), and compare the results with a similar study three years earlier. School nurses (n = 736) from all counties in Sweden completed a questionnaire in spring 2016, four years after the implementation of the national HPV vaccin...

Data set 2013. (XLS)

STROBE checklist. (DOCX)

Data set 2016. (XLS)

BACKGROUND Parents' beliefs about human papillomavirus (HPV) vaccination influence whether they allow their daughters to be vaccinated. We examined the association between parents' refusal and sociodemographic background, knowledge and beliefs about HPV, and the HPV vaccination in relation to the Health Belief Model. METHODS The sample consisted o...

Background Postponing parenthood has steadily increased during the past decades in Western countries. This trend has affected the size of families in the direction of fewer children born per couple. In addition, higher maternal age is associated with an increased risk of pregnancy-related complications such as prematurity and foetal death, while hi...

Having children or not is one of the most important decisions that a person will make in his or her lifetime. The Reproductive Life Plan (RLP) is a protocol that aims to encourage both women and men to reflect on their reproductive intentions and to find strategies for successful family planning, for example to have the wanted number of children an...

Introduction Genetic technologies advance rapidly. It is possible to undergo genetic carrier screening before pregnancy to examine genetic risks to future offspring. We aimed to investigate parents’ interest and motives towards preconception genetic carrier screening (PCS) as well as factors associated with interest in PCS. Material and methods Ou...

The third European Congress on Preconception Health and Care was held in Uppsala, Sweden in February 2016. The congress was hosted by the Medical Faculty at Uppsala University and the PrePreg Research Network. This informal network was established after the first European Congress on Preconception Health and Care in Brussels in 2010. The aim of the...

Objectives: The aim of this study was to assess women's experiences of having an early medical abortion at home and to investigate their perceptions of the information provided before the abortion. The study also aimed to investigate possible differences between groups of women. Study design: The study is cross-sectional with a descriptive and c...

Objective. To investigate the association between adverse childhood experiences (ACE) and pain with onset during pregnancy. Design. Cross-sectional study. Setting. Eighteen antenatal clinics in southern Mid-Sweden. Sample. Of 293 women invited to participate, 232 (79%) women agreed to participate in early pregnancy and were assessed in late pregnan...

Objectives: The aims of this study were to describe patterns of pornography consumption, investigate differences between consumers and non-consumers of pornography regarding sexual experiences, health and lifestyle and determine associations between pornography consumption and sexual experiences, health and lifestyle among adolescent girls. The hy...

Aim: The aim of this study was to investigate lifestyle habits and lifestyle adjustments among subfertile women trying to conceive. Materials and methods: Women (n = 747) were recruited consecutively at their first visit to fertility clinics in mid-Sweden. Participants completed a questionnaire. Data were analyzed using logistic regression, t te...

Objective To improve primary prevention of human papillomavirus (HPV) infection by promoting vaccination and increased condom use among upper secondary school students. Design Cluster randomised controlled trial. Setting 18 upper secondary schools in Sweden. Participants Schools were first randomised to the intervention or the control group, after...

Objectives: The aim of our study was to investigate Ukrainian medical students' intentions and attitudes in relation to future parenthood, and their knowledge about fertility. Methods: A classroom survey was carried out of randomly selected groups among 3568 Russian-speaking medical students. The response rate was 88.8%; 858 were female and 407...

Introduction: Prevalence of planned pregnancies varies between countries but is often measured in a dichotomous manner. The aim of this study was to investigate to what level pregnant women had planned their pregnancies and whether pregnancy planning was associated with background characteristics and pregnancy planning behavior. Material and meth...

Aim: To investigate the occurrence of self-reported sexually transmitted infections (STIs) and associated factors among female university students requesting contraceptive counselling. Material and methods: Cross-sectional study. Female university students (n = 353) completed a waiting-room questionnaire in connection with contraceptive counsell...

joint planning and decision-making within couples have evident effects on the well-being of the family. The purpose of this study was to investigate the level of pregnancy planning among pregnant women and their partners and to compare the coherence of pregnancy planning within the couples. pregnant women and their partners were recruited from 18 a...

To investigate the association between adverse childhood experiences (ACE) and pain with onset during pregnancy. Cross-sectional study. Eighteen antenatal clinics in southern Mid-Sweden. Among 293 invited, 232 (79%) women agreed to participate in early pregnancy and were assessed in late pregnancy. Questionnaires were distributed in early and late...

How is the reproductive life plan (RLP) adopted in midwifery contraceptive counselling? A majority of midwives adopted the RLP in their counselling, had predominantly positive experiences and considered it a feasible tool for promoting reproductive health. The RLP is a health-promoting tool recommended by the Centers for Disease Control and Prevent...

How is the reproductive life plan (RLP) adopted in midwifery contraceptive counselling? A majority of midwives adopted the RLP in their counselling, had predominantly positive experiences and considered it a feasible tool for promoting reproductive health. The RLP is a health-promoting tool recommended by the Centers for Disease Control and Prevent...

Aims and objectivesTo describe the perspectives of expectant mothers and fathers on fathers' involvement during pregnancy.Background Becoming a father is a major life event and paternal involvement during pregnancy has a positive influence on the family. However, research into both expectant mothers' and fathers' perspectives on fathers' involvemen...

To study female students' sexual and contraceptive behavior and compare these results with earlier surveys. Comparative, repeated cross-sectional surveys, started in 1989 and repeated every fifth year. Contraceptive counseling delivered at a Student Health Center in Sweden. Female university students (n = 359). Multiple-choice waiting-room question...

Objectives: Preconception care is important for the screening, prevention and management of risk factors that affect pregnancy outcomes. We aimed to investigate pre-pregnancy care policies, guidelines, recommendations and services in six European countries. Methods: In 2013, an electronic search and investigation was undertaken of preconception...

Background Sweden introduced a school-based human papillomavirus (HPV) vaccination programme in 2012, and school nurses are responsible for managing the vaccinations. The aim of the present study was to investigate the attitudes and experiences of school nurses regarding the school-based HPV vaccination programme 1 year after its implementation. M...

The aims were to gain a deeper understanding of how personnel, who work with adolescents, reason about the effect of pornography and its spread in the media, and to explore how well prepared they consider themselves to be in addressing sexual health and gender equality. An inductive, exploratory, qualitative study with focus group discussions was s...

The study investigated the differences between high school boys and girls in: (1) the use of pornography, (2) sexual experiences, (3) experience of sexual abuse, and (4) perceptions of sexuality and pornography. It also examined the possible predictors of experiencing sexual activities, such as sex, sociodemographic factors (high school program, ho...

Objectives To investigate sexual experiences, sexually transmitted infections (STIs) and use of condoms in relation to human papillomavirus (HPV)-vaccination status in female high school students. Methods In 2013, 355 female students with a median age of 18 years from randomly selected high schools in Sweden answered a classroom questionnaire on se...

To explore why parents refused to allow their 10- to 12-year-old daughters to receive the human papillomavirus (HPV) vaccination from the Swedish school-based vaccination programme. Individual interviews with 25 parents who had been offered, but not consented to, their daughters receiving the HPV vaccination. Five themes emerged through the intervi...

Objective To investigate the extent to which Danish women attending antenatal care plan their pregnancies and to determine the association between pregnancy planning and the intake of folic acid, alcohol consumption and smoking habits prior to conception and before the 16th week of gestation. Methods A cross-sectional survey of 258 women. Main outc...

Parental stress can negatively affect the parent-child relationship and reduce the well-being of the whole family. Family disagreement is associated with parental divorce and with psychological problems in children. The aim was to examine perceived parental stress and draw comparisons among mothers and among fathers, in relation to educational leve...

Objective. The objective of this study was to evaluate the effect of an intervention with advance provision of emergency contraceptive pills (ECP), condoms, and extended information to a targeted group of teenage girls, compared with a control group, 12 months after intervention. Material and methods. A randomized controlled trial among 420 girls,...

The rise in human papillomavirus (HPV) infection has been suggested to be responsible for the increased incidence of oropharyngeal cancer in the Western world. This has boosted interest in oral HPV prevalence and whether HPV vaccines can prevent oral HPV infection. In a previous study we showed oral HPV prevalence to be almost 10% in youth aged 15-...

To describe patterns of pornography use among high school boys and to investigate differences between frequent, average, and nonfrequent users of pornography with respect to sexual experiences, lifestyles, and self-rated health. A population-based classroom survey among 16-year-old boys (n = 477), from 53 randomly selected high school classes in 2...