chew kah teik;nor azlin binti mohamed ismail;shamsul azhar bin shah;nur azurah binti abdul ghani;muhammad azrai bin abu.  (2023).  impact of covid 19 pandemic towards family planning in malaysia.  - .  . 

vikneswary ravi kumar, nirmala chandralega kampan, nor haslinda abd aziz, chew kah teik, mohamad nasir shafiee and p. susthitha menon.  (2023).  recent advances in surface plasmon resonance (spr) technology for detecting ovarian cancer biomarkers.  - cancers.  5607-5633. 

chew kah teik.  (2023).  ukm medical students and academic staffs’ perception towards online clerkship in obstetric and gynaecology during covid-19 pandemic..  - .  1-6. 

mohd nazzary mamat @ yusof, kah teik chew, nirmala chandralega kampan, nor haslinda abd. aziz, abdul muzhill hannaan abdul hafizz, mohamad nasir shafiee.  (2023).  gene expression of immune-related markers, pd-1, pd-l1, and pd-l2 in tissue of endometrioid endometrial cancer.  - the medical journal of malaysia.  73. 

ghofraan abdulsalam atallah, nirmala chandralega kampan, kah teik chew, norfilza mohd mokhtar, reena rahayu md zin, mohamad nasir bin shafiee and nor haslinda binti abd. aziz.  (2023).  predicting prognosis and platinum resistance in ovarian cancer: role of immunohistochemistry biomarkers.  - international journal of molecular sciences.  1-20. 

abdul muzhill hannaan abdul hafizz, norfilza mohd mokthar, reena rahayu md zin, nigel p mongan, mohd nazzary mamat@yusof, kah teik chew, nirmala chandralega kampan, nor haslinda abd aziz, mohamad nasir shafiee.  (2023).  variable expression of igf-1 mrna isoforms in endometrioid endometrial cancer (eec).  - medical journal of malaysia.  6. 

rodziah romli, rahana abd rahman, syahnaz mohd hashim, kah teik chew, emma mirza wati mohamad, azmawati mohammed nawi.  (2023).  women's motivation towards pap smear screening based on sexual and screening status: a cross-sectional study using protection motivation theory.  - journal of education and health promotion.  1-6. 

mohd nazzary mamat @ yusof, kah teik chew, nirmala chandralega kampan and mohamad nasir shafiee.  (2023).  expression of pd-1 and pd-l1 in endometrial cancer: molecular and clinical significance.  - international journal of molecular sciences.  1-17. 

nur azirah raidah abdul rahim, rahana abd rahman, chew kah teik, mohd. azrai abu, lim pei shan.  (2023).  a retrospective study of anaemia and pregnancy outcomes in hctm ukm.  - medicine & health.  14. 

rodziah ramli, azmawati mohammed nawi, rahana abd rahman, emma mirza wati mohamad, kah teik chew, syahnaz mohd hashim.  (2023).  development and validation of electronic health video sedar to improve motivation and uptake towards cervical cancer screening.  - 23rd national public health colloqium.  89. 

mohd nazzary mamat @ yusof, kah teik chew, abdul muzhill hannaan abdul hafizz, siti hajar abd azman, wira sorfan ab razak , muhammad rafiuddin hamizan , nirmala chandralega kampan and mohamad nasir shafiee.  (2023).  efficacy and safety of pd-1/pd-l1 inhibitor as single-agent immunotherapy in endometrial cancer: a systematic review and meta-analysis.  - cancers.  1-18. 

zulazmi sutaji, muhammad azrai abu, nurainie sayutti, marjanu hikmah elias, mohd faizal ahmad, abdul ghani nur azurah, kah teik chew, abdul kadir abdul karim, norhaslinda abd. aziz, mohd helmy mokhtar, reena rahayu, zeti-azura mohamed-hussein.  (2023).  endometrial heparin-binding epidermal growth factor gene expression and hormone level changes in implantation window of obese women with polycystic ovarian syndrome.  - biomedicines.  1-9. 

abdul muzhill hannaan abdul hafizz, reena rahayu md zin, nor haslinda abd aziz, muaatamarulain mustangin, nirmala chandralega kampan, norfilza mohd mokthar, kah teik chew and mohamad nasir shafiee.  (2022).  igf-1 and igfbp-1 expressions as the potential prognostic biomarkers in women with endometrioid endometrial cancer (eec).  - bmc proceedings.  32. 

mohd nazzary mamat @ yusof, kah teik chew, nirmala kampan, nor haslinda abd. aziz and mohamad nasir shafiee.  (2022).  the efficacy and safety of pd-1/pd-l1 immunotherapy in endometrial cancer: a meta-analysis.  - bmc proceedings:the international conference on molecular diagnostics & biomarker discovery 2022.  2. 

wei keong chieng, muhammad irfan abdul jalal, jashveerdeep singh bedi, ani amelia zainuddin, mohd helmy mokhtar, muhammad azrai abu, kah teik chew and abdul ghani nur azurah.  (2022).  probiotics, a promising therapy to reduce the recurrence of bacterial vaginosis in women? a systematic review and meta-analysis of randomized controlled trials.  - frontiers in nutrition.  1-12. 

nirmala chandralega kampan, chew kah teik, mohamed nasir shafiee, abdul kadir abdul karim, lim pei shan, nor azlin mohamed ismail, nur azurah abd ghani.  (2022).  the covid-19 pandemic: the experiences of hospital canselor tuanku muhriz (hctm).  - .  9. 

lim leek mei, muhammad azrai abu, chew kah teik, aniza ismail, ani amelia zainuddin and nur azurah abdul ghani.  (2022).  the reliability and validity of the malay version of polycystic ovarian syndrome health-related quality of life questionnaire.  - frontier of endocrinology.  1-7. 

rodziah romli, emma mirza wati mohamad, rahana abd rahman, chew kah teik, syahnaz mohd hashim and azmawati mohammed nawi.  (2022).  translation, cross-cultural adaptation, and validation of the malay version of the protection motivation theory scale questionnaire for pap smear screening.  - international journal of environmental research and public health.  1-11. 

sharvina ramesh rao, nirmala kampan, kah teik chew, mohamad nasir shafiee.  (2022).  the impact of the covid-19 pandemic on the national hpv immunization program in malaysia.  - frontiers in public health.  1-4. 

haridass gunasegaran, wan rahiza wan mat, chew kah teik, omar sulaiman.  (2022).  a comparison of systematic versus subdermal surgical site infiltration after abdominal hysterectomy: a randomised controlled trial.  - malaysian journal of anaesthesiology.  25-26. 

uma mariappen, chew kah teik, ani amelia zainuddin, zaleha abdullah mahdy , nur azurah abdul ghani, sonia grover.  (2022).  quality of life of adolescents with menstrual problems in klang valley, malaysia: a school population-based cross-sectional study.  - bmj open.  1-8. 

nirmala chandralega kampan*, chew kah teik and mohammed nasir shafiee.  (2022).  where are we going with sentinel nodes mapping in ovarian cancer?.  - frontiers in oncology.  1-11. 

zainab hananah abang abdullah, chew kah teik, v. ramesh v. velayudham, zainab yahaya, amilia afzan mohd jamil, muhammad azrai abu, nur azurah abdul ghani, nor azlin mohamed ismail.  (2022).  pre-induction cervical assessment using transvaginal ultrasound versus bishops cervical scoring as predictors of successful induction of labour in term pregnancies: a hospital-based comparative clinic.  - plos one.  1-14. 

rodziah romli, rahana abd rahman, emma mirza wati mohamad, kah teik chew, syahnaz mohd hashim, azmawati mohammed nawi.  (2022).  exploring womens motivation towards cervical cancer screening: an in-depth interview based on protection motivation theory.  - iphc 2022.  30. 

nor azila, wei keong chieng, ani amelia zainuddin, kah teik chew, aida kalok, muhammad azrai abu, beng kwang ng, nor azlin mohammed, abdul ghani nur azurah.  (2022).  effect of acupressure at p6 on nausea and vomiting in women with hyperemesis gravidarum: a randomized controlled trial.  - international journal of enviromental research and public health.  1-10. 

rodziah romli, rahana abd rahman , emma mirza wati mohamad , chew kah teik ,syahnaz mohd hashim , azmawati mohammed nawi.  (2022).  developing the content of e-health video on cervical cancer screening based on protection motivation theory a nominal group technique study.  - 2nd national epidemiology conference.  3. 

rodziah ramli, emma mirza wati mohammad, rahana abd rahman, chew kah teik, shahnaz mohd hashim, azmawati mohammed nawi.  (2022).  women's motivation towards pap smear screening: a cross sectional study based on protection motivation theory.  - 23rd nih scientific conference.  20. 

rodziah romli, rahana abd rahman, kah teik chew, syahnaz mohd hashim ,emma mirza wati mohamad, azmawati mohammed nawi.  (2022).  empirical investigation of e-health intervention in cervical cancer screening: a systematic literature review.  - plos one.  1-17. 

haridass gunasegaran, wan rahiza wan mat, chew kah teik, omar sulaiman.  (2022).  a comparison of systematic versus subdermal surgical site infiltration after abdominal hysterectomy: a randomised controlled trial.  - myanaesthesia 2022: focus forging onwards to a collaborative unified success.  64. 

mohd nazzary mamat @ yusof, kah teik chew, nirmala kampan, nor haslinda abdul aziz, reena rahayu md zin, geok chin tan, mohamad nasir shafiee.  (2022).  pd-l1 expression in endometrial cancer and its association with clinicopathological features: a systematic review and meta-analysis.  - cancers.  1-18. 

masturah ramli, nurismah md isa, noorhafizah wagiman, chew kah teik, wang ming, nordashima abd shukor.  (2021).  high grade serous carcinoma of fallopian tube presented as peritoneal carcinomatosis: a case report.  - malaysian journal of pathology.  482. 

boom ping khoo, chew kah teik, erica yee hing, nirmala kampan and mohamad nasir shafiee.  (2021).  distant recurrence of endometrial cancer more than 10 years after hysterectomy: a case report.  - hormone molecular biology and clinical investigation.  429-433. 

ghofraan abdulsalam atallah, nor haslinda abd. aziz, chew kah teik, mohamad nasir shafiee and nirmala chandralega kampan.  (2021).  new predictive biomarkers for ovarian cancer.  - diagnostics.  1-20. 

janisha silva raju, nor haslinda abd. aziz, ghofraan abdulsalam atallah, chew kah teik, mohamad nasir shafiee, muhammad fakhri mohd saleh, ravichandran jeganathan, reena rahayu md zin and nirmala chandralega kampan.  (2021).  prognostic value of tnfr2 and stat3 among high-grade serous ovarian cancer survivors according to platinum sensitivity.  - diagnostics.  1-11. 

chew kah teik, nirmala kampan, mohamad nasir shafiee.  (2021).  perception and knowledge of human papillomavirus (hpv) vaccine for cervical cancer prevention among fully vaccinated female university students in the era of hpv vaccination: a cross-sectional study.  - bmj open.  1-7. 

rima anggrena dasrilsyaha, aida kalok, beng kwang ng, anizah ali, kah teik chew and pei shan lim.  (2021).  perineal skin tear repair following vaginal birth skin adhesive versus conventional suture - a randomised controlled trial.  - journal of obstetrics and gynaecology.  242-247. 

aida kalok, sweet yi esther loh , kah teik chew , nor haslinda abdul aziz , shamsul azhar shah ,shuhaila ahmad, nor azlin mohamed ismail, zaleha abdullah mahdy.  (2020).  vaccine hesitancy towards childhood immunisation amongst urban pregnant mothers in malaysia.  - vaccine.  2183-2189. 

chew kah teik, nirmala kampan, mohamad nasir shafiee.  (2020).  recurrence of ovarian cancer with distant metastasis after five years: a single institute experience.  - international journal of gynecological cancer.  A74-A75. 

loh sweet yi esther, kah teik chew, rahana abd rahman, ani amelia zainuddin, erica yee hing and nirmala kampan.  (2020).  uterine-conserving approach in ruptured intramyometrial ectopic pregnancy.  - hormone molecular biology and clinical investigations.  100-101. 

n kampan, j silva raju, kt chew, mf mohd saleh, rr md zin, r jeganathan, mn shafieeand n abd aziz.  (2020).  the protein expression of tnfr2 and stat3 in high-grade serous ovarian cancer (hgsc) tissue and its association with platinum sensitivity.  - international journal of gynecological cancer.  A47. 

chew kah teik.  (2020).  kenapa kes covid-19 masih tinggi walaupun pkpb?.  - malaysiakini.com.  1-5. 

mohamad nasir shafiee, chew kah teik, reena rahayu md zain, nirmala kampan.  (2020).  ovarian and uterine leiomyosarcoma: which one is the primary?.  - hormone molecular biology and clinical investigation.  1-3. 

dr zainab hananah abang abdullah, dr viknesvaran anbalagan, dr khoo boom ping, dr chew kah teik.  (2020).  interim guideline during covid-19 pandemic: gynaecologic oncology unit.  - interim guideline during covid-19 pandemic: gynaecologic oncology unit.  1-19. 

chew kah teik, muhammad azrai abu, nur azurah abd ghani, shuhaila ahmad, zaleha abdullah mahdy.  (2019).  labour ward companion.  - .  14. 

nur aini mohd zain,nur azurah abdul ghani,muhammad azrai abu, chew kah teik,nor azlin mohamed ismail,shuhaila ahmad.  (2019).  can neonatal birth weight predicted using umbilical cord circumferences?.  - 27th international congress of the obstetrical and gynaecological society of malaysia.  10-11. 

muhammad azrai abu, chew kah teik, mohd faizal ahmad, nur azurah abdul ghani, nor azlin mohamed ismail.  (2019).  tubo-ovarian abscesses complicated with septic shock following operative hysteroscopy.  - gazzetta medica italiana archivio per le scienze mediche.  907-909. 

aqmar suraya sulaiman, chew kah teik, lee choon yee, nur azurah ghani, zaleha abdullah mahdy.  (2019).  labour ward companion.  - .  30. 

muhammad azrai abu, chew kah teik, nur azurah abdul ghani, mohammad shawal faizal, chai s. ngiu , nor azlin mohd ismail.  (2019).  chest pain in pregnancy: a false alarm.  - gazzetta medica italiana archivio per le scienze mediche.  157-160. 

nur aini mohd zain, nur azurah abdul ghani, muhammad azrai abu, chew kah teik, nor azlin mohamed ismail, shuhaila ahmad.  (2019).  can neonatal birth weight be predicted using umbilical cord circumference?.  - medical journal of malaysia.  18. 

mohd faizal ahmad, nur zawani zakaria, noorazizah arsad, kah teik chew, muhammad azrai abu, mohd nasir shafiee, mohd hashim omar.  (2019).  a case of post-splenectomy transfusion-dependent homozygousbeta-thalassemia major complicated with myocardial siderosis and osteoporosis and usage of iron-chelating therapy with deferiprone....  - hormone molecular biology and clinical investigation.  1-3. 

chew kah teik; nurul iftida basri; abdul kadir abdul karim; muhammad azrai abu; mohd faizal ahmad; nur azurah abdul ghani; erica yee hing; rozman zakaria; jegan a/l thanabalan; azizi abu bakar; nor azlin mohamed ismail.  (2019).  management options and outcome of cerebral arteriovenous malformation in pregnancy: case series.  - archives of iranian medicine.  340-343. 

muhammad azrai abu, chew kah teik, abdul kadir abdul karim, nur azurah abdul ghani.  (2018).  knowledge, attitude and practice towards intrauterine contraception device among doctors in an urban city of malaysia.  - gynecological endocrinology the 18th world congress.  . 

loh sweet yi esther, aida hani mohd kalok, chew kah teik, nor haslinda abdul aziz, shuhaila ahmad, nor azlin mohd ismail, zaleha abdullah mahdy, shamsul azhar shah.  (2018).  vaccine hesitancy toward childhood immunisation among antenatal mothers at national university hospital kuala lumpur.  - medical journal of malaysia.  . 

mohd faizal ahmad, muhammad azrai abu, chew kah teik, kun leng sheng, mohd asyraf zakaria.  (2018).  a positive urine pregnancy test (upt) with adnexal mass; ectopic pregnancy is not the ultimate diagnosis.  - hormone molecular biology and clinical investigation..  . 

kah teik chew, muhammad azrai abu, mohd faizal ahmad, nur azurah abdul ghani.  (2018).  bilateral mature cystic teratoma masquerading as an ectopic pregnancy: a case report and review of the literature.  - journal of gynecologic surgery.  252-254. 

chew kah teik, nurul iftidah basri, abdul kadir abdul karim, muhammad azrai abu, mohd faizal ahmad, nur azurah abdul ghani, erica yee hing, rozman zakaria, jegan a/l thanabalan, azizi abu bakar, nor azlin mohamed ismail.  (2018).  cerebral arteriovenous malformation in pregnancy: management options and outcome in a tertiary centre.  - medical journal of malaysia.  . 

kah teik chew, izyan atiqah zakaria, muhammad azrai abu, mohd faizal ahmad, erica yee hing, nur azurah abdul ghani.  (2018).  elevated serum ca 19-9 with adnexal mass: is it always an ovarian malignancy?.  - hormone molecular biology and clinical investigation.  . 

chew kah teik, norsaadah salim, muhammad azrai abu, abdul kadir abdul karim.  (2018).  knowledge, attitudes and practice regarding copper intrauterine contraceptive devices among doctors in malaysia.  - bmj sexual and reproductive health (journal of family planning and reproductive health care).  . 

nirmala chandralega kampan, rabiatuladawiyahm.g., siew fai l., low s.w., muhd. fauzia., chew kahteik, mohd nasir shafiee.  (2018).  prediction of prognostic factors in women with recurrent endometrial carcinoma.  - 17th biennial meeting of the international gynecologic cancer society.  . 

chew kah teik, najah,sahiran, mohamed azrai abu, nur azurah abdul ghani.  (2018).  effectiveness of short educational intervention to improve parents knowledge and awareness towards hpv vaccination.  - 17th biennial meeting of the international gynecologic cancer society.  . 

k.t. chew, s. najah, a. muhammad azrai, a.g. nur azurah.  (2018).  dose short educational intervention improve parents knowledge and awareness towards human papillomavirus (hpv) vaccination.  - international journal of gynecological cancer.  254. 

lim ps, dasrilsyah ra, kalok ahm, ng bk, ali a, chew kt.  (2018).  adhesive glue versus conventional suture for first degree perineal tear repair- a randomized controlled trial.  - bjog-an international journal of obstetrics and gynaecology.  . 

muhammad azrai abu, chew kah teik, nur azurah abdul ghani, mohd faizal ahmad, nor azlin mohd ismail.  (2018).  chest pain in pregnancy:a false alarm.  - rcog world congress 2018, singapore.  . 

nor azila mohd nafiah, chew kah teik, aida hani kalok, mohammad azrai abu, ani amelia zainuddin, nur azurah abdul gahni.  (2018).  women with hyperemesis gravidarum: does acupressure wristband helps in reducing severity?.  - rcog world congress 2018.  . 

nurkhairulnisa abu ishak, chew kah teik, ani amelia zainudin, lim pei shan, mohamad nasir shafiee, nirmala kampan, wan salwina wan ismail, sonia grover, nur azurah abdul ghani.  (2018).  management of menstrual disorder in adolescent girls with intellectual disabilities: a blessing or a curse?.  - obstetrics and gynecology international.  . 

chew kah teik, norsaadah salim, muhammad azrai abu, abdul kadir abdul karim, nur azurah abdul ghani.  (2018).  knowledge, perception and practice towards intrauterine contraception device among doctors in wilayah persekutuan kuala lumpur, malaysia.  - rcog world congress 2018.  . 

yulianty arifuddin, chew kah teik, mohamad nasir shafiee.  (2017).  (human papilloma virus) vaksin dan kanser serviks: adakah saya terlewat?.  - impak penyelidikan translasi@ukm.  9-10. 

abdul kadir abdul karim, aida hani mohd kalok, ainul mardhiah abdul wahab, ani amelia zainuddin, anizah ali, chew kah teik,ixora kamisan atan, lim pei shan, mohd hashim omar, mohd nasir shafiee, muhammad azrai abu, ng beng kwang, nor azlin mohamed ismail.  (2017).  obstetrics and gynecology clinic guidebook.  - .  105. 

chew kah teik, muhammad azrai abu, yulianty arifuddin, nor azlin mohamed ismail, noor ain mohd nasir, fazarina mohammed, nur azurah abdul ghani.  (2017).  ectopic adrenal tissue associated with borderline mucinous cystadenoma of ovary: a case report with review of the literature.  - hormone molecular biology and clinical investigation.  1-5. 

chew kah teik, mohd faizal ahmad, yong soon leong and nor azlin mohamed ismail.  (2017).  pulmonary hypertension complicating systemic sclerosis: a successful pregnancy outcome.  - journal of obstetrics and gynaecology.  677-678. 

kah teik chew, salim norsaadah, aziz suraya, erica yee hing, zainuddin ani amelia, mohd ismail nor azlin, abdul ghani nur azurah.  (2017).  primary umbilical endometriosis successfully treated with dienogest: a case report.  - hormone molecular biology and clinical investigation.  67-69. 

ng beng kwang, tasneem mahayudin, hii ling yien, abdul kadir abdul karim, chew kah teik, lim pei shan.  (2016).  effect of an educational intervention on knowledge of human papilomavirus vaccination among pre-unversity students in malaysia.  - asian pacific journal of cancer prevention.  267-274. 

noorazizah arsad, chew kah teik, nur azurah abdul ghani, hui jan tan, norasyikin a wahab, nor azlin mohd ismail.  (2016).  morning sickness of pregnancy: more than meets the eye.  - hormone molecular biology and clinical investigation.  1-3. 

chew k.t, mohd faizal a, s.l yong, m.i nor azlin.  (2016).  pulmonary hypertension in systemic sclerosis: a successful pregnancy outcome.  - 25th obstetrics & gynaecology society of malaysia congress (ogsm) 2016.  1. 

nirmala chandralega kampan & chew kah teik.  (2016).  an essential guide to - basic gynae-laparoscopy.  - .  102. 

erica yee hing, soo fin low, chai soon ngiu, kah teik chew, zahiah mohamed.  (2015).  metastatic gestational trophoblastic neoplasia: masqueraded as respiratory disease and intracranial haemorrhage?.  - international medical journal.  486-488. 

lee cl, ng bk, nurismah mi, chew kt, aruku n, lim ps.  (2015).  concurrent utero-vaginal prolapse with cervical angiomyofibroblastoma: a rare disease with distinct entitiy.  - journal surgical academia.  58-61. 

boom-ping khoo, aruku naidu, nur azurah abd. ghani, beng-kwang ng, abdul kadir abdul karim, kah-teik chew, nirmala chandralega kampan, pei-shan lim.  (2015).  lower urinary tract symptoms among female doctors in university kebangsaan malaysia medical centre.  - 24th asian & oceanic congress of obstetrics & gynaecology.  . 

boom-ping khoo, aruku naidu, nur azurah abd. ghani, beng-kwang ng, abdul kadir abdul karim, kah-teik chew, nirmala chandralega kampan, pei-shan lim.  (2015).  lower urinary tract symptoms among female doctors in university kebangsaan malaysia medical centre.  - journal of obstetrics and gynaecology research.  62-63. 

ng beng kwang, choy mun yee, lim pei shan, chew kah teik, kampan nirmala chandralega, abdul kadir abdul karim, mohd dali ahmad zailani hatta.  (2014).  knowledge, perception and attitude towards human papillomavirus among pre-university students in malaysia.  - asia pacific journal of cancer prevention.  9117-9123. 

pei shan lim, nor azlin mohamed ismail, nur azurah abd ghani, nirmala chandralega kampan, aqmar suraya sulaiman, beng kwang ng, kah teik chew, abdul kadir abdul karim, muhammad abdul jamil mohd yassin.  (2014).  retained placenta: do we have any option?.  - world journal of obstetrics & gynecology.  124-129. 

kamarul bahya mustafa, habibah abdul hamid, lim pei shan, chew kah teik, wan syahirah yang mohsin, lee chui ling, zainul rashid mohd razi, mohd hashim oma.  (2014).  heterotopic triplet pregnancy with bilateral tubal ectopic post ivf-icsi of two embryos.  - 15th annual congress of asia-pacific association for gynecologic endoscopy and minimally invasive therapy.  . 

mohamad nasir shafiee, kah teik chew, nirmala kampan, pei shan lim, mohd hashim omar, nur azurah ghani, ahmad hatta mohd dali.  (2013).  perception, knowledge and attitude towards human papilloma virus infection and vaccination for cervical cancer prevention among university students.  - brunei international medical journal.  9(5):315-324. 

chew kah teik, mohamad nasir shafiee, lim pei shan, nirmala kampan, mohd hashim omar, hatta mohd dali.  (2011).  perception, knowledge and attitute towards human papillomavirus (hpv) and hpv vaccination for cervical cancer prevention among university student.  - 21st congress of the obstetrical & gynaecological society of malaysia.  .