Genetics in prenatal diagnosis.

The options for prenatal genetic testing have evolved rapidly in the past decade, and advances in sequencing technology now allow genetic diagnoses to be made down to the single-base-pair level, even before the birth of the child. This offers women the opportunity to obtain information regarding the foetus, thereby empowering them to make informed decisions about their pregnancy. As genetic testing becomes increasingly available to women, clinician knowledge and awareness of the options available to women is of great importance. Additionally, comprehensive pretest and posttest genetic counselling about the advantages, pitfalls and limitations of genetic testing should be provided to all women. This review article aims to cover the range of genetic tests currently available in prenatal screening and diagnosis, their current applications and limitations in clinical practice as well as what the future holds for prenatal genetics.

Does an educational video for aneuploidy screening improve informed choice among pregnant women? A randomised controlled trial.

BACKGROUND: Poor knowledge and the lack of deliberation have been cited as reasons for women making uninformed choices about aneuploidy screening. Adequate pre-test counselling is of particular importance where non-invasive prenatal screening (NIPS) is being increasingly offered as a primary screening test. DESIGN: Women attending the antenatal clinic with a singleton pregnancy below 14 weeks were randomised to receive routine counselling or the intervention-a 16-min educational video on aneuploidy screening before their consult. The primary outcome, rate of informed choice, was assessed using an adapted multidimensional measure of informed choice questionnaire, where informed choice was defined as good knowledge and value-consistent behaviour. Secondary outcomes included informed choice with deliberation, decisional conflict and anxiety. RESULTS: Two hundred and eighty-six women were recruited. 69.8% of women in the intervention group made an informed choice compared with 53.6% in the control group (Risk Ratio [RR] 1.30, p = 0.014). A significantly higher number of women in the intervention group had good knowledge compared to controls (81% vs. 60.9%; RR 1.33, p = 0.001). Decisional conflict did not differ between groups, but women in the intervention group had higher anxiety scores (p < 0.001). CONCLUSION: The study intervention was effective in helping women make informed choice. Qualitative studies to determine the reason for increased anxiety are needed. TRIAL REGISTRATION: Trial registry: ClinicalTrials.gov; Identifier: NCT05492981.

Antenatal corticosteroids in Singapore: A clinical and scientific assessment.

Preterm birth (PTB; delivery prior to 37 weeks' gestation) is the leading cause of early childhood death in Singapore today. Approximately 9% of Singaporean babies are born preterm; the PTB rate is likely to increase given the increased use of assisted reproduction technologies, changes in the incidence of gestational diabetes/high body mass index and the ageing maternal population. Antenatal administration of dexamethasone phosphate is a key component of the obstetric management of Singaporean women who are at risk of imminent preterm labour. Dexamethasone improves preterm outcomes by crossing the placenta to functionally mature the fetal lung. The dexamethasone regimen used in Singapore today affords a very high maternofetal drug exposure over a brief period of time. Drawing on clinical and experimental data, we reviewed the pharmacokinetic profile and pharmacodynamic effects of dexamethasone treatment regimen in Singapore, with a view to creating a development pipeline for optimising this critically important antenatal therapy.

Mentoring a surgical team towards procedural competence in the early learning curve for selective fetoscopic laser photocoagulation.

INTRODUCTION: Selective fetoscopic laser photocoagulation (SFLP) for twin-to-twin transfusion syndrome (TTTS) is challenging for new surgeons at the start of their learning curve. We described an approach utilising telementoring and team-based training to facilitate rapid attainment of the skills required for safe and efficient practice with a limited caseload. METHODS: We conducted a prospective observational study of SFLP performed by the novice primary surgical team in three stages: under direct on-site supervision from an expert mentor (Group 1), with remote tele-guidance from that mentor (Group 2) and independently (Group 3), at an academic tertiary hospital in Singapore. The primary team undertook regular training on high-fidelity tissue models to accelerate skills acquisition and complement the surgical performance. RESULTS: 9 patients diagnosed with Stage 2 TTTS were assessed for procedural characteristics, surgical outcomes and perinatal survival following SFLP. There were no significant differences in operative duration, anastomoses ablated, gestational age or birth weight at delivery. The complications observed were: recurrent TTTS (22.2% of pregnancies), twin anaemia polycythaemia sequence (33.3%), preterm prelabour membrane rupture (22.2%) and delivery at < 32 weeks (44.4%). ≥ 1 twin was live-born in 88.9% of cases, while postnatal survival to six months of ≥ 1 twin occurred in 77.8% of cases. CONCLUSION: Systematic mentoring and specialised skills training are useful in aiding new surgeons to negotiate the steep learning curve and achieve good outcomes at the start of a new practice, particularly in the setting of low patient numbers. This is best paired with dedicated model training to achieve and maintain surgical dexterity for this complex procedure.

Trisomy 21 in both fetuses in a DCDA twin pregnancy.

A woman's chances of having a child with Down syndrome increases with age. By age 40, the risk of conceiving a child with Down syndrome is about 1 in 100. We report a rare case of dizygotic dichorionic diamniotic twin pregnancy conceived via in vitro fertilisation, with both twins having trisomy 21. Both fetuses were independently detected to be at high risk of autosomal trisomy, initially via first-trimester screening and subsequently via invasive definitive diagnostic tests (ie, chorionic villus sampling and amniocentesis).Diagnosis of trisomy 21 has to be made via initial non-invasive prenatal screening, followed by further rigorous and accurate invasive pregnancy testing for confirmation. The gravity of the results necessitates high detection rates and high specificity of prenatal screening tests. Management of the patient must be multidisciplinary and supportive in nature, involving extensive and non-directive pregnancy counselling and management, genetic counselling and management of psychological distress.

Acceptability and feasibility of outpatient medical abortion with mifepristone and misoprostol up to 70 days gestation in Singapore.

OBJECTIVES: The aim of the study was to examine the acceptability and feasibility of using a combined regimen of 200 mg mifepristone and 800 µg buccal misoprostol in an outpatient abortion service in Singapore, where mifepristone is not currently registered. STUDY DESIGN: The pilot prospective study enrolled 130 women who sought termination of pregnancies up to 70 days gestation at two public hospitals in Singapore. Women received 200 mg mifepristone to take at the clinic or at home, followed 24 h later by 800 µg buccal misoprostol administered at home. A follow-up visit was scheduled seven to ten days after mifepristone to confirm the outcome of the abortion. The primary outcome was rate of successful abortion and secondary outcomes were women's preference for location of mifepristone administration and satisfaction with the method. RESULTS: The large majority of women (96.8%) had successful abortions without recourse to surgical intervention. Most women (88.2%) chose to take mifepristone at the clinic. Most women reported the side effects as acceptable (68.3%) or neutral (26.0%). Almost all women (94.4%) were very satisfied or satisfied with the method. CONCLUSIONS: Outpatient medical abortion with mifepristone and misoprostol up to 70 days gestation is acceptable and feasible and has the potential to expand available options in Singapore.

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators.

Fetoscopic laser coagulation of arterio-venous anastomoses (AVA) in a monochorionic placenta is the standard of care for twin-twin transfusion syndrome (TTTS), but is technically challenging and can lead to significant complications. Acquiring and maintaining the necessary surgical skills require consistent practice, a critical caseload, and time. Training on realistic surgical simulators can potentially shorten this steep learning curve and enables several proceduralists to acquire procedure-specific skills simultaneously. Here we describe realistic simulators designed to allow the user familiarity with the equipment and specific steps required in the surgical treatment of TTTS, including fetoscopic handling, approaches to anterior and posterior placenta, recognition of anastomoses, and efficient coagulation of vessels. We describe the skills that are especially important in conducting placental laser coagulation that the surgeon can practice on the model and apply in a clinical case. These models can be adapted easily depending on the availability of materials and require standard fetoscopy equipment. Such training systems are complementary to traditional surgical apprenticeships and can be useful aids for fetal medicine units that provide this clinical service.

Rapid initiation of fetal therapy services with a system of learner-centred training under proctorship: the National University Hospital (Singapore) experience.

INTRODUCTION: Management of complicated monochorionic twins and certain intrauterine structural anomalies is a pressing challenge in communities that still lack advanced fetal therapy. We describe our efforts to rapidly initiate selective feticide using radiofrequency ablation (RFA) and selective fetoscopic laser photocoagulation (SFLP) for twin-to-twin transfusion syndrome (TTTS), and present the latter as a potential model for aspiring fetal therapy units. METHODS: Five pregnancies with fetal complications were identified for RFA. Three pregnancies with Stage II TTTS were selected for SFLP. While RFA techniques utilising ultrasonography skills were quickly mastered, SFLP required stepwise technical learning with an overseas-based proctor, who provided real-time hands-off supervision. RESULTS: All co-twins were live-born following selective feticide; one singleton pregnancy was lost. Fetoscopy techniques were learned in a stepwise manner and procedures were performed by a novice team of surgeons under proctorship. Dichorionisation was completed in only one patient. Five of six twins were live-born near term. One pregnancy developed twin anaemia-polycythaemia sequence, while another was complicated by co-twin demise. DISCUSSION: Proctor-supervised directed learning facilitated the rapid provision of basic fetal therapy services by our unit. While traditional apprenticeship is important for building individual expertise, this system is complementary and may benefit other small units committed to providing these services.

A prospective, open-label, single arm, multicentre study to evaluate efficacy, safety and acceptability of pericoital oral contraception using levonorgestrel 1.5 mg.

STUDY QUESTION: Will the use of levonorgestrel (LNG) 1.5 mg taken at each day of coitus by women who have relatively infrequent sex be an efficacious, safe and acceptable contraceptive method? SUMMARY ANSWER: Typical use of LNG 1.5 mg taken pericoitally, before or within 24 h of sexual intercourse, provides contraceptive efficacy of up to 11.0 pregnancies per 100 women-years (W-Y) in the primary evaluable population and 7.1 pregnancies per 100 W-Y in the evaluable population. WHAT IS KNOWN ALREADY: LNG 1.5 mg is an effective emergency contraception following unprotected intercourse. Some users take it repeatedly, as their means of regular contraception. STUDY DESIGN, SIZE, DURATION: This was a prospective, open-label, single-arm, multicentre Phase III trial study with women who have infrequent coitus (on up to 6 days a month). Each woman had a follow-up visit at 2.5, 4.5 and 6.5 months after admission or until pregnancy occurs if sooner, or she decided to interrupt participation. The study was conducted between 10 January 2012 and 15 November 2014. PARTICIPANTS/MATERIALS, SETTING, METHODS: A total of 330 healthy fertile women aged 18-45 years at risk of pregnancy who reported sexual intercourse on up to 6 days a month, were recruited from four university centres located in Bangkok, Thailand; Campinas, Brazil; Singapore and Szeged, Hungary to use LNG 1.5 mg pericoitally (24 h before or after coitus) as their primary method of contraception. The participants were instructed to take one tablet every day she had sex, without taking more than one tablet in any 24-h period, and to maintain a paper diary for recording date and time for every coital act and ingestion of the study tablet, use of other contraceptive methods and vaginal bleeding patterns. Anaemia was assessed by haemoglobin evaluation. Pregnancy tests were performed monthly and pregnancies occurring during product use were assessed by ultrasound. At the 2.5-month and final visit at 6.5 months, acceptability questions were administered. MAIN RESULTS AND THE ROLE OF CHANCE: There were 321 women included in the evaluable population (which includes all eligible women enrolled), with 141.9 woman-years (W-Y) of observation and with a rate (95% confidence interval [CI]) of 7.1 (3.8; 13.1) pregnancies per 100 W-Y of typical use (which reflects use of the study drug as main contraceptive method, but also includes possible use of other contraceptives from admission to end of study) and 7.5 (4.0; 13.9) pregnancies per 100 W-Y of sole use. In the primary evaluable population (which includes only eligible enrolled women <35 years old), the rate was 10.3 (5.4; 19.9) pregnancies per 100 W-Y of typical use, and 11.0 (5.7; 13.1) pregnancies per 100 W-Y of sole use. There were three reported severe adverse events and 102 other mild adverse events (most common were headache, nausea, abdominal and pelvic pain), with high recovery rate. The vaginal bleeding patterns showed a slight decrease in volume of bleeding and the number of bleeding-free days increased over time. There was only one case of severe anaemia, found at the final visit (0.4%). The method was considered acceptable, as over 90% of participants would choose to use it in the future or would recommend it to others. LIMITATIONS, REASONS FOR CAUTION: This was a single-arm study with small sample size, without a control group, designed as a proof of concept study to explore the feasibility of this type of contraception. WIDER IMPLICATIONS OF THE FINDINGS: A larger clinical study evaluating pericoital contraception with LNG is feasible and our data show that this method would be acceptable to many women. STUDY FUNDING/COMPETING INTERESTS: This study received partial financial support from the UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Reproductive Health and Research (RHR) and the World Health Organization. Gynuity and the Bill and Melinda Gates Foundation (BMGF) provided financial support for project monitoring. HRA Pharma donated the LNG product. N.K. was the initial project manager when she was with WHO/HRP and was employed by HRA Pharma, which distributes LNG for emergency contraception. The other authors declare no conflicts of interest. TRIAL REGISTRATION NUMBER: This study was registered on ANZCTR, Trial ID ACTRN12611001037998. TRIAL REGISTRATION DATE: 4 October 2011. DATE OF FIRST PATIENT'S ENROLMENT: 10 January 2012.

Knowledge and factors determining choice of contraception among Singaporean women.

INTRODUCTION: The study aimed to assess the level of awareness and knowledge of contraception among women in Singapore, and identify the factors that influence contraception choice. METHODS: We conducted a cross-sectional survey of 259 female patients, aged 21-49 years, who attended the Obstetrics and Gynaecology Clinic at National University Hospital, Singapore. An original questionnaire on nine contraceptive methods was used. Respondents who had ≥ 2 correct answers for a method (out of four questions) were considered to have good knowledge of the method. Participants were asked to rate factors known to influence contraceptive choice as important or not important. RESULTS: Awareness of the following methods was high: condom (100.0%), oral contraception pill (89.2%), tubal ligation (73.0%) and copper intrauterine device (IUD) (72.2%). The women were least aware of hormonal IUD (24.3%). Women who were parous, had a previous abortion, had completed their family or used contraception previously were more likely to have a higher awareness of contraception. 89.2% of the women had good knowledge of the condom; among those aware of hormonal IUD, only 46.0% had good knowledge of it. Women who had used hormonal IUD and the condom were more likely to have good knowledge of them. Many rated efficacy (90.5%) and a healthcare professional's advice (90.1%) as important in contraceptive choice. Few considered peer influence (21.0%) and cultural practices (16.3%) to be important. CONCLUSION: Women in Singapore have poor awareness and knowledge of contraception, especially long-acting reversible methods. More effective ways are needed to educate women about contraceptive methods.

Ureterovaginal fistula after insertion of a McDonald suture: Case report and review of published reports.

Complications associated with cerclage that are commonly described in the existing published reports include injuries to the cervix or bladder, premature rupture of membranes, chorioamnionitis and bleeding. We report an unusual complication of a ureterovaginal fistula formation after the insertion of a McDonald suture.

First ever case of spontaneous triplet cornual pregnancy: management of laparoscopic cornual resection with modified endoloop method.

A 23-year-old woman, gravida 2 para 0, presented at 8 weeks gestation with a spontaneously conceived triplet cornual ectopic pregnancy. She was at high risk of ectopic pregnancy as she had been previously treated for pelvic inflammatory disease and had also undergone laparoscopic salpingostomy for right-sided ectopic pregnancy. She was clinically stable and her abdomen was soft and non-tender. The diagnosis was made on transvaginal ultrasound scan and this was confirmed on the three-dimensional scan. She was counselled about her treatment options and subsequently underwent laparoscopic cornual resection using the modified endoloop method. The estimated blood loss was 20 ml intraoperatively and the patient recovered well. She subsequently conceived spontaneously with an intrauterine pregnancy and underwent lower segment caesarean section at 37 weeks in view of previous laparoscopic cornual resection. Intraoperatively, the right cornua appeared normal and there was no sign of thinning.