Jennifer K.Y. Ko

ORCID: 0000-0003-0475-0645
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About
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Research Areas
  • Ectopic Pregnancy Diagnosis and Management
  • Ovarian function and disorders
  • Reproductive Biology and Fertility
  • Assisted Reproductive Technology and Twin Pregnancy
  • Gestational Trophoblastic Disease Studies
  • Pregnancy and Medication Impact
  • Maternal and fetal healthcare
  • Endometriosis Research and Treatment
  • Hormonal and reproductive studies
  • Reproductive Health and Technologies
  • Reproductive Health and Contraception
  • Reproductive System and Pregnancy
  • Sperm and Testicular Function
  • Vitamin D Research Studies
  • Menstrual Health and Disorders
  • Urinary and Genital Oncology Studies
  • Surgical Simulation and Training
  • Neonatal and Maternal Infections
  • Anatomy and Medical Technology
  • Uterine Myomas and Treatments
  • Streptococcal Infections and Treatments
  • Gynecological conditions and treatments
  • Urological Disorders and Treatments
  • Maternal and Neonatal Healthcare
  • Ultrasound in Clinical Applications

University of Hong Kong
2016-2025

Queen Mary Hospital
2016-2025

Kwong Wah Hospital
2025

Chinese University of Hong Kong
2024-2025

University College Hospital
2017

University College London
2017

Abstract Purpose To assess the association of serum vitamin D level and live birth rate in women undergoing frozen embryo transfer (FET). Methods This is a retrospective cohort study involving 1489 infertile who had at two tertiary reproductive medicine centres from 2019 to 2021. Only first was included for repeated transfers during period. Archived samples taken LH surge or before start progestogens FET were analysed 25(OH)D levels using mass spectrometry. The main outcome measure rate....

10.1007/s10815-024-03326-z article EN cc-by Journal of Assisted Reproduction and Genetics 2025-01-09

To review the management and outcome of all women with caesarean scar pregnancy (CSP) at a single centre.A retrospective diagnosed CSP between January 2004 December 2013 was performed. Women were identified from admission Early Pregnancy Assessment Clinic records.Twenty-two cases during study period. The median gestational age diagnosis 6.7 weeks (range 4.7-11.8 weeks). All diagnoses made by ultrasound, most common finding which heterogeneous mass site (100%). duration for human chorionic...

10.1111/ajo.12273 article EN Australian and New Zealand Journal of Obstetrics and Gynaecology 2014-10-28

This study aims to investigate the association of pre-conception vitamin D levels on adverse pregnancy outcomes in women undergoing vitro fertilization with fresh embryo transfer. was a retrospective cohort using archived serum 25-hydroxyvitamin measured period before ovarian stimulation patients autologous A total 306 were included and their resulting recorded. Patients who deficient (< 20ng/ml) compared those non-deficient (≥20ng/ml) analysed for any outcomes. 16/306 (5.3%) had...

10.1186/s12958-025-01343-w article EN cc-by-nc-nd Reproductive Biology and Endocrinology 2025-01-09

Abstract Aims The association between a pregnant mother’s vitamin D status and depressive symptoms has yielded inconsistent results. It is possible that other factors play role in this association, as depression can have multiple causes. Recognizing the significance of husband’s participation antenatal care, study aimed to examine whether involvement moderates link during pregnancy. Methods A total 2983 Chinese married women, their 25–35 weeks pregnancy, completed questionnaires assess...

10.1017/s2045796025000022 article EN cc-by-nc-nd Epidemiology and Psychiatric Sciences 2025-01-01

We present two cases of suspected intramural pregnancy after failed intervention for ‘miscarriage’ an initially presumed normally sited pregnancy. The diagnosis was assumed retrospectively taking into consideration the whole clinical picture. These illustrate difficulty in early and further confirmation, need a high index suspicion case standard management miscarriage.

10.1136/bcr-2024-263146 article EN BMJ Case Reports 2025-02-01

Abstract Breast cancer is the most common in reproductive age women. The aim of this study to assess knowledge, attitude and intention on fertility preservation among women diagnosed have breast cancer. This a multi-centre cross-sectional questionnaire study. Reproductive with attending Oncology, Surgery Gynaecology Clinics support groups were invited participate. Women filled paper or electronic form questionnaire. 461 recruited 421 returned Overall, 181/410 (44.1%) had heard preservation....

10.1038/s41598-023-36377-w article EN cc-by Scientific Reports 2023-06-14

Vitamin D receptors are present in the female reproductive tract. Studies on association between serum vitamin level and pregnancy rate of vitro fertilization (IVF) showed inconsistent results focused a single fresh or frozen embryo transfer cycle. The objective our study was to evaluate if before ovarian stimulation associated with cumulative live birth (CLBR) first IVF cycle.Retrospective cohort study.Women who underwent cycle from 2012 2016 at university-affiliated medicine center were...

10.1530/ec-21-0444 article EN cc-by-nc-nd Endocrine Connections 2022-01-14

The purpose of this study was to review the management and outcomes all patients with pregnancy unknown location who had serum human chorionic gonadotropin (hCG) levels greater than 1000 mIU/mL in our institution determine likelihood a subsequent normal intrauterine at different hCG discriminatory levels.A retrospective performed on women admitted diagnosis an level over 5-year period (July 2007 June 2012). Patients were identified from computerized result database. medical records,...

10.7863/ultra.33.3.465 article EN Journal of Ultrasound in Medicine 2014-02-24

Ulipristal acetate (UPA) and mifepristone are currently well-established agents for emergency contraception. Both drugs selective progestogen receptor modulators which have been shown to better efficacy than the widely used levonorgestrel in prevention of pregnancy. However, there is only limited information on action UPA sperm function. The present study compared vitro biological effects human functions. Spermatozoa from semen samples with normal parameters were isolated. Capacitated...

10.1111/j.2047-2927.2014.00261.x article EN Andrology 2014-08-28

Will use of oral progestogen in women with threatened miscarriage the first trimester reduce rate when compared placebo?Use did not before 20 weeks placebo.Miscarriage is a common complication pregnancy and occurs 15-20% clinically recognized pregnancies. Use vaginal progestogens effective reducing but there still no good evidence to support for treatment miscarriage.This was randomized double-blind controlled trial. A total 406 presenting were recruited from 30 March 2016 May 2018.Women...

10.1093/humrep/deaa327 article EN Human Reproduction 2020-11-08

Molar pregnancy found in a cesarean scar is exceedingly rare. It can be challenging to manage and have potentially catastrophic consequences.A 34-year-old multigravid woman presented with persistent symptoms of after surgical termination pregnancy. Cesarean molar was suspected on ultrasonography, suction evacuation performed under ultrasound guidance. This followed by bimanual compression, oxytocin, uterine artery embolization reduce bleeding.A high index suspicion needed for early diagnosis...

10.1097/aog.0b013e3182322f31 article EN Obstetrics and Gynecology 2012-01-24

To evaluate the association of serum adiponectin level with metabolic syndrome in Chinese women polycystic ovary (PCOS).This was a cross-sectional study carried out Hong Kong PCOS at university-affiliated tertiary hospital between January 2010 and 2011. Clinical biochemical parameters were analysed. Prediction determined by receiver-operator characteristic (ROC) curves, univariate multivariate logistic regression analyses.A total 116 diagnosed to have The area under ROC curve for prediction...

10.3109/09513590.2015.1126708 article EN Gynecological Endocrinology 2015-12-24

To review the treatment choices of women with complete androgen insensitivity syndrome (CAIS) at a single tertiary centre.Retrospective review.Women CAIS identified from our database.The study group comprised 141 CAIS. Eleven percent (16/141) had gonads in situ, 3 whom were under workup for gonadectomy. The age gonadectomy remainder 125 was 17 (0.1-53) years. most common form HRT oral oestrogen or transdermal 80% (113/141). 13/141 (9%) used vaginal oestrogens alone together other forms HRT....

10.1530/ec-17-0083 article EN cc-by-nc-nd Endocrine Connections 2017-06-15

To compare the proportion of women achieving a desired ovarian response following stimulation when gonadotropin dosing was determined based on antral follicle count (AFC) vs serum anti-Müllerian hormone (AMH) level, in undergoing in-vitro fertilization (IVF) using gonadotropin-releasing (GnRH) antagonist protocol.This randomized double-blind trial carried out university-affiliated assisted reproduction unit. A total 200 their first IVF cycle GnRH-antagonist protocol between April 2016 and...

10.1002/uog.20402 article EN Ultrasound in Obstetrics and Gynecology 2019-07-20

Background Group B Streptococcus (GBS) is a leading cause of neonatal morbidity and mortality. In an effort to reduce the impact this serious affliction, universal screening for GBS has been adopted in many countries. The objective study was examine acceptability self-collected swabs local population Hong Kong. Methods This cross-sectional questionnaire survey conducted tertiary teaching hospital. A total 327 pregnant women who attended antenatal clinic from April 2012 May were included our...

10.1016/j.jcma.2015.08.005 article EN cc-by-nc-nd Journal of the Chinese Medical Association 2015-09-16
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