farah hanan fathihah jaffar, syed muhamad asyraf syed taha, atikah hairulazam, aini farzana zulkifli, mohd farisyam mat ros, khairul osman, zahriladha zakaria, mohd amyrul azuan mohd bahar, siti fatimah ibrahim.  (2026).  high-frequency 5g radiofrequency exposure accelerates testicular ageing via apoptosis in male rats.  - i-sihat 2026.  . 

norazurashima jamaludin, siti fatimah ibrahim, khairul osman, syed muhamad asyraf syed taha, atikah hairulazam, sivasatyan vijay, aini farzana zulkefli, mohd farisyam mat ros and farah hanan fathihah jaffar.  (2025).  time-dependence effect of 2.45 ghz rf-emr exposure on male reproductive hormones and lhcgr .  - journal of pioneering medical sciences.  43 - 51. 

norazurashima jamaludin , siti fatimah ibrahim , farah hanan fathihah jaffar , aini farzana zulkefli and khairul osman.  (2025).  the influence of 2.45 ghz wi-fi exposure duration on sperm quality and testicular histopathology: an exploration of peroxidative injury.  - antioxidants.  1 - 14. 

khairul osman, nor hamizan hashim, siti fatimah ibrahim.  (2025).  the effects of sedative and stimulant agents of illicit drugs on male fertility: a scoping review.  - fourrages.  1 - 13. 

sivasatyan vijay, siti fatimah ibrahim, khairul osman, aini farzana zulkefli, mohd farisyam mat ros, norazurashima jamaludin, syed muhamad asyraf syed taha, atikah hairulazam, farah hanan fathihah jaffar.  (2025).  histomorphometry and sperm quality in male rats exposed to 2.45 ghz wi-fi.  - reproduction.  1 - 12. 

atikah hairulazam, siti fatimah ibrahim, khairul osman, mohd helmy mokhtar, aini farzana zulkefli1, mohd farisyam mat ros, norazurashima jamaludin, syed muhamad asyraf syed taha, sivasatyan vijay, farah hanan fathihah jaffar.  (2025).  the effect of 3.5 ghz exposure on the parameters of libido in male rats.  - 5th international conference on advances in medical science (icams 2025).  . 

datu agasi mohd kamal, siti fatimah ibrahim, azizah ugusman dan mohd helmy mokhtar.  (2025).  kelulut honey ameliorates oestrus cycle, hormonal profiles, and oxidative stress in letrozole-induced polycystic ovary syndrome rats.  - .  155 - 175. 

siti fatimah ibrahim, nur farahin abu bakar, neetyaa sre paranthaman, tong sheng gan, jazebelle faith childs, nurul atiqah azhar, aini farzana zulkefli, mohd farisyam mat ros, khairul osman, farah hanan fathihah jaffar.  (2025).  testicular morphological alterations in 2.45 ghz wi-fi exposed rat pups and the mitigating effects of edible bird nest .  - medicine and health.  764 - 775. 

mohd helmy mokhtar, siti fatimah ibrahim dan khairatul nadia ramli.  (2025).  madu gelam bantu tangani gejala menopaus secara alami.  - portal berita ukm.  . 

khairul osman, siti fatimah ibrahim, nur syahmimi nadwa binti mohd isa, nur nabila zulkifli, ifa suefiqah mohd zulfikar, rogayah abu hassan @ mohamed, khairunnisa zaidan, mira hazira zaid, rus dina rus din, seri mirianti ishar, atikah mohd nasir, nor ayuslinawati che sidik, nurfaizah abu tahrim, norfaizan padli, wan mohd razi idris, nur amirah amerudin, mohammad kassim.  (2025).  laporan teknikal makmal perisikan 2024 sehingga mac 2025.  - .  . 

khairul osman, siti fatimah ibrahim, nur syahmimi nadwa binti mohd isa, nur nabila zulkifli, ifa suefiqah mohd zulfikar, rogayah abu hassan @ mohamed, khairunnisa zaidan, mira hazira zaid, rus dina rus din, seri mirianti ishar, atikah mohd nasir, nor ayuslinawati che sidik, mohammad kassim.  (2025).  laporan teknikal makmal perisikan ukm-pdrm may 2025.  - .  . 

farah hanan fathihah, siti fatimah ibrahim, sivasatyan vijay, norazurashima jamaludin, khairul osman.  (2025).  wi-fi exposure alters male reproductive parameters: evidence from a rodent model.  - 38th scientific meeting of the malaysian society of pharmacology and physiology.  . 

farah hanan fathihah jaffar, siti fatimah ibrahim.  (2025).  .  - berita ukm.  . 

mohd helmy mokhtar, siti fatimah ibrahim dan halina md. noor.  (2025).  madu gelam tangani gejala menopaus secara alami.  - utusan malaysia.  . 

syed muhamad asyraf syed taha, farah hanan fathihah jaffar, atikah hairulazam, sivasatyan vijay, norazurashima jamaludin, aini farzana zulkifli, mohd farisyam mat ros, khairul osman, zahriladha zakaria, mohd amyrul azuan mohd bahar and siti fatimah ibrahim.  (2025).  prolonged 3.5 ghz and 24 ghz rf-emf exposure alters testicular immune balance, apoptotic gene expression, and sperm function in rats.  - biomedicines.  1 - 18. 

farah hanan fathihah jaffar, nurul atiqah azhar, sofwatul mokhtarah maluin, khairul osman, siti fatimah ibrahim .  (2025).  edible bird nest supplementation enhances male reproductive function: current insights and future horizons.  - foods.  1 - 21. 

farah hanan fathihah jaffar, siti fatimah ibrahim.  (2025).  gagal hamil, salah wanita atau lelaki.  - malaysia gazette.  . 

nurul atiqah azhar, khairul osman, farah hanan fathihah jaffar, chua kien hui, farisyam mat ros, aini farzana zulkefli, siti fatimah ibrahim.  (2024).  effect of edible bird nest supplementation against busulfan-induced oligospermia in adult rats.  - sains malaysiana.  1219-1234. 

siti fatimah ibrahim, nur syahmimi nadwa binti mohd isa, vivaashiny a/p balakrishnan, khairul osman, jalifah binti latip, seri mirianti ishar, rus dina rus din.  (2024).  pembangunan protokol sampel-prep untuk urin yang mengandungi metabolik dadah nps.  - .  1-64. 

mohd helmy bin mokhtar;siti fatimah binti ibrahim;azizah binti ugusman;aini farzana binti zulkefli;muaatamarulain bin mustangin.  (2024).  investigating the effects of kelulut honey on letrozole-induced polycystic ovary syndrome model in rats.  - .  . 

farah hanan fathihah jaffar, khairul osman, chua kien hui, aini farzana zulkefli, siti fatimah ibrahim.  (2024).  effect of wi-fi exposure and edible bird nest supplementation on the testicular oxidative stress status and sperm quality in male sprague-dawley rat pups.  - international journal of radiation research.  329 - 338. 

sivasatyan vijay, siti fatimah ibrahim, khairul osman, aini farzana zulkefli, mohd farisyam mat ros, norazurashima jamaludin, syed muhamad asyraf syed taha, atikah hairulazam, farah hanan fathihah jaffar.  (2024).  relationship of serum and testicular testosterone on sperm parameters following 2.45ghz wi-fi exposure in male sprague dawley rat.  - 14th international symposium of health sciences .  . 

syed muhamad asyraf syed taha, farah hanan fathihah jaffar, khairul osman, atikah hairulazam, sivasatyan vijay, aini farzana zulkefli, mohd farisyam mat ros, norazurashima jamaludin, zahriladha zakaria, siti fatimah ibrahim .  (2024).  effect of prolonged exposure to 3.5 ghz 5g technology on heatshock proteins & sperm parameters in male sprague dawley rats: comparison of 1-hour and 7-hour exposure.  - 14th international symposium of health sciences .  . 

norazurashima jamaludin, khairul osman, farah hanan fathihah jaffar, siti fatimah ibrahim.  (2024).  the influence of 2.45 ghz wi-fi exposure duration on sperm quality and testicular ultrastructure: exploration on peroxidative injury.  - 14th international symposium of health sciences .  . 

khairi zubaidi zakaria, muhammad afiq khalid, khairul osman, nurin haziqah razali, siti fatimah ibrahim, atikah mohd nasir.  (2024).  research trends of monitoring domestic wastewater on investigative studies for illicit drugs manufacturing: a bibliometric analysis.  - national forensic science symposium 2024.  . 

maluin, sofwatul mokhtarah; jaffar, farah hanan fathihah; osman, khairul; zulkefli, aini farzana; mat ros, mohd farisyam; ibrahim, siti fatimah.  (2024).  exploring edible bird nest's potential in mitigating wi-fi's impact on male reproductive health.  - reproductive medicine and biology.  1 - 13. 

nur hilwani, ibrahim siti fatimah, mokhtar mohd helmy, yahaya azyani, zulkefli aini farzana, ankasha sheril june, osman khairul.  (2023).  modulation of vulvovaginal atrophy (vva) by gelam honey in bilateral oophorectomized rats.  - frontiers in endocrinology.  1-13. 

jaya kumar a/l murthy;norhazlina binti abdul wahab;siti fatimah binti ibrahim;norlinah binti mohamed ibrahim;mohd heikal bin mohd yunus;isa bin naina mohamed;shahrul azmin bin md. rani;rashidi mohamed bin pakri mohamed;azizah binti ugusman;nur fudhla bint.  (2023).  ibro-aprc neuroscience school on neuromics: the yin-yang aspect in translational neuroscience.  - .  . 

jaya kumar a/l murthy;norhazlina binti abdul wahab;siti fatimah binti ibrahim;norlinah binti mohamed ibrahim;mohd heikal bin mohd yunus;isa bin naina mohamed;shahrul azmin bin md. rani;rashidi mohamed bin pakri mohamed;azizah binti ugusman;nur fudhla bint.  (2023).  ibro-aprc neuroscience school on neuromics: the yin-yang aspect in translational neuroscience.  - .  . 

kok-yong chin, ahmad nazrun shuid and siti fatimah ibrahim.  (2023).  editorial: nutraceuticals modulation for oxidative stress in disease and health.  - frontiers in pharmacology.  1-2. 

farah hanan fathihah jaffar, siti fatimah ibrahim, khairul osman, chua kien hui.  (2023).  wi-fi dan sistem pembiakan lelaki: pencegahan menggunakan sarang burung walit.  - .  167. 

mohd helmy mokhtar, datu agasi mohd kamal, siti fatimah ibrahim, azizah ugusman.  (2023).  kelulut honey improves oestrus cycle, hormonal profiles, and oxidative stress markers in letrozole-induced polycystic ovary syndrome rats.  - the 10th federation of the asian and oceanian physiological societies congress 2023 (faops).  206. 

jaffar farah hanan fathihah, osman khairul, hui chua kien, zulkefli aini farzana, ibrahim siti fatimah.  (2022).  long term wi-fi exposure from pre-pubertal to adult age on the spermatogonia proliferation and protective effects of edible bird's nest supplementation.  - frontiers in physiology.  199-209. 

siti fatimah ibrahim.  (2022).  nerve, muscle & ans.  - .  1-45. 

siti fatimah binti ibrahim;khairul bin osman;mohd helmy bin mokhtar;farah hanan fathihah binti jaffar.  (2022).  the effect of wi-fi emitting radiofrequency radiation on the c-kit expression of adiff spermatogonia in the testes of developing spraque dawley male pups..  - .  . 

datu agasi mohd kamal, siti fatimah ibrahim, azizah ugusman dan mohd helmy mokhtar.  (2022).  effects of kelulut honey on oestrus cycle regulation and histomorphological changes in letrozole-induced polycystic ovary syndrome rats: a preliminary study.  - life.  1-15. 

mohd helmy bin mokhtar;ruszymah binti haji idrus;norhazlina binti abdul wahab;norfilza mohd mokhtar;siti fatimah binti ibrahim.  (2022).  elucidating the effects of gelam honey on morphology and ionic channels expression of reproductive organs in postmenopausal rat models.  - .  . 

ahmad rohi g, anisah n, asmah h, mahanem mn, hassan md, mohd hafiz s, john shia ks, kamisah y, khairul o, low kc, mohd hanafi ad, norazrina a, nur azlina mf, siti balkis b, siti fatimah i, tay st, vivian jg, zamirah za, chen hc.  (2022).  universiti kebangsaan malaysia ethical principles and guidelines on the use of laboratory animals.  - .  93. 

sofwatul mokhtarah maluin, siti fatimah ibrahim, khairul osman, farah hanan fathihah jaffar.  (2022).  effect of edible bird nest supplementation on reproductive hormone in adult spermatogenesis following wi-fi exposure.  - 35th annual scientific meeting of the malaysian society of pharmacology and physiology (mspp 2022).  S144. 

nurul atiqah binti azhar, farah hanan fathihah jaffar, khairul osman, mohd farisyam mat ros, aini farzana zulkefli, chua kien hui, siti fatimah ibrahim.  (2022).  protective effects of edible bird nest on p38 mapk pathway in busulfan-induced sprague dawley rats.  - 35th annual scientific meeting of the malaysian society of pharmacology and physiology (mspp 2022).  S151. 

datu agasi mohd kamal, siti fatimah ibrahim, azizah ugusman, mohd helmy mokhtar.  (2022).  kelulut honey ameliorates oestrus cycle, hormonal profiles, and oxidative stress in letrozole-induced polycystic ovary syndrome rats.  - antioxidants.  1-21. 

datu agasi mohd kamal, siti fatimah ibrahim, azizah ugusman, siti sarah mohamad zaid and mohd helmy mokhtar.  (2022).  kelulut honey improves folliculogenesis, steroidogenic, and aromatase enzyme profiles and ovarian histomorphology in letrozole-induced polycystic ovary syndrome rats.  - nutrients.  1-17. 

datu agasi mohd kamal, siti fatimah ibrahim, azizah ugusman, mohd helmy mokhtar.  (2022).  kelulut honey regulates sex steroid receptors in a polycystic ovary syndrome rat model.  - international journal of molecular sciences.  1-19. 

datu agasi mohd kamal, siti fatimah ibrahim, haziq kamal, mohd izhar ariff mohd kashim and mohd helmy mokhtar.  (2021).  physicochemical and medicinal properties of tualang, gelam and kelulut honeys: a comprehensive review.  - nutrients.  1-31. 

mohd helmy bin mokhtar;norhazlina binti abdul wahab;norfilza binti mohd mokhtar;siti fatimah binti ibrahim.  (2021).  investigating the effect of testosterone on connexins expression in early pregnant rat.  - .  . 

nur hilwani ismail, siti fatimah ibrahim, farah hanan fathihah jaffar, mohd helmy mokhtar, kok yong chin and khairul osman.  (2021).  augmentation of the female reproductive system using honey: a mini systematic review.  - molecules.  1-17. 

farah hanan fathihah jaffar, khairul osman, chua kien hui, aini farzana zulkefli and siti fatimah ibrahim.  (2021).  edible bird's nest supplementation improves male reproductive parameters of sprague dawley rat.  - frontiers in pharmacology.  1-6. 

nur hilwani ismail, khairul osman, aini farzana zulkefli, mohd helmy mokhtar and siti fatimah ibrahim.  (2021).  the physicochemical characteristics of gelam honey and its outcome on the female reproductive tissue of sprague-dawley rats : a preliminary study.  - molecules.  1-25. 

maluin sofwatul mokhtarah, osman khairul, jaffar farah hanan fathihah, ibrahim siti fatimah.  (2021).  effect of radiation emitted by wireless devices on male reproductive hormones: a systematic review.  - frontiers in physiology.  1-8. 

nur hilwani ismail, khairul osman, aini farzana zulkefli, mohd helmy mokhtar, siti fatimah ibrahim.  (2021).  atrophic vaginitis by gelam honey in sprague dawley rats: pilot study of potential apitherapy for managing genitourinary syndrome.  - malaysian society of pharmacology and physiology 34th scientific meeting 2021.  198-199. 

datu agasi mohd kamal, siti fatimah ibrahim, mohd helmy mokhtar.  (2021).  a preliminary study of the effects of kelulut honey on ovarian histology in letrozole-induced polycystic ovary syndrome model in rats.  - malaysian society of pharmacology & physiology (mspp) - 34th scientific meeting 2021.  200. 

farah hanan fathihah jaffar, khairul osman, chua kien hui, aini farzana zulkefli and siti fatimah ibrahim.  (2021).  edible bird's nest supplementation improves male reproductive parameters of sprague dawley rats.  - frontiers in pharmacology.  21-26. 

norhazlina abdul wahab, zahreena othman, noor wahidah mohd nasri, mohd helmy mokhtar, siti fatimah ibrahim, adila a. hamid, raja affendi raja ali and norfilza mohd mokhtar.  (2020).  inhibition of mir-141 and mir-200a increase dlc-1 and zeb2 expression, enhance migration and invasion in metastatic serous ovarian cancer.  - international journal of environmental research and public health.  1-14. 

datu agasi mohd kamal, siti fatimah ibrahim, mohd helmy mokhtar.  (2020).  androgen effect on connexin expression in the mammalian female reproductive system: a systematic review.  - bosnian journal of basic medical sciences.  293-302. 

datu agasi mohd kamal, siti fatimah ibrahim, mohd helmy mokhtar.  (2020).  effects of testosterone on the expression of connexin 26 and connexin 43 in the uterus of rats during early pregnancy.  - in vivo.  1863-1870. 

haziq kamal, geok chin tan, siti fatimah ibrahim, mohd. farooq shaikh, isa naina mohamed, rashidi m. pakri mohamed, adila a. hamid, azizah ugusman and jaya kumar.  (2020).  alcohol use disorder, neurodegeneration, alzheimer's and parkinson's disease: interplay between oxidative stress, neuroimmune response and excitotoxicity.  - frontiers in cellular neuroscience.  1-15. 

datu agasi mohd kamal, siti fatimah ibrahim, mohd helmy mokhtar.  (2020).  testosterone effects on the expression of connexin 26 and connexin 43 in the uterus of rats during early pregnancy.  - 22nd medical and health research week 2020.  108. 

amilia a,mohd heikal my,mohd helmy m,siti fatimah i,norfilza mm,ruszymah bhi,chua kh,azizah u,norhazlina aw,jaya kumar m,adila ah,norizam s,zanariyah a,aini farzana z,amiza h,norliza s,nur fudhla mn,norshafila dmr,nazierah ag,kamariah o,syamsawal qz.  (2020).  physiology practical: contraction of skeletal muscle.  - .  1. 

mohd heikal my,mohd helmy m,siti fatimah i,norfilza mm,ruszymah bhi,chua kh,azizah u,amilia a,norhazlina aw,jaya kumar m,adila ah,norizam s,zanariyah a,aini farzana z,amiza h,norliza s,nur fudhla mn,norshafila dmr,nazierah ag,kamariah o,syamsawal qz.  (2020).  respiratiry practical: 4 objectives to understand volumes and capacities.  - .  1. 

adila ah,mohd heikal my,mohd helmy m,siti fatimah i,norfilza mm,ruszymah bhi,chua kh,azizah u,amilia a,norhazlina aw,jaya kumar m,norizam s,zanariyah a,aini farzana z,amiza h,norliza s,nur fudhla mn,norshafila dmr,nazierah ag,kamariah o,syamsawal qz.  (2020).  physiology practical: blood.  - .  1. 

siti fatimah i,chua kh,mohd heikal my,mohd helmy m,norfilza mm,ruszymah bhi,azizah u,amilia a,norhazlina aw,jaya kumar m,adila ah,norizam s,zanariyah a,aini farzana z,amiza h,norliza s,nur fudhla mn,norshafila dmr,nazierah ag,kamariah o,syamsawal qz.  (2020).  physiology practical: adaptation of cardiovascular system in physioogycal conditions.  - .  1. 

mohd helmy mokhtar, naguib salleh, norhazlina abdul wahab, norfilza mohd mokhtar, siti fatimah ibrahim.  (2020).  investigating the effect of testosterone on connexins expression in early pregnant rat.  - .  1-7. 

khairul bin osman, siti fatimah ibrahim, noor hashida hashim.  (2020).  quantification of fluorochrome protamination intensity in sperm dna wrapping materials towards male infertility.  - .  1-10. 

ahmad rohi ghazali, anisah nordin, asmah hamid, kamisah yusof, khairul osman, low kiat cheong, mohd hanafi ahmad damanhuri, norazrina azmi, nur azlina mohd fahami, siti balkis budin, siti fatimah ibrahim, tay sun tee, zamirah zainal abidin.  (2020).  prinsip dan garis panduan etika penggunaan haiwan makmal universiti kebangsaan malaysia.  - .  94. 

farah dayana rosli, noor hashida hashim, yusmin mohd yusuf, khairul osman, siti fatimah ibrahim, nurul kabir.  (2019).  thymoquinone enhances sperm dna integrity in nicotine-induced infertile male rats.  - tropical journal of pharmaceutical research.  1219-1225. 

farah hanan fathihah jaffar, khairul osman, nur hilwani ismail, kok-yong chin and siti fatimah ibrahim.  (2019).  adverse effects of wi-fi radiation on male reproductive system: a systematic review.  - tohoku journal of experimental medicine.  169-179. 

farah dayana rosli, noor hashida hashim, khairul osman, siti fatimah ibrahim, nurul kabir..  (2019).  ameliorative effects of thymoquinone on sperm parameters and testosterone level of nicotine-treated sprague dawley rats.  - brazilian archives of biology and technology.  1-11. 

khairul osman, rafeah pakri mohamed, mohd hashim omar, siti fatimah ibrahim, norhamizan hashim.  (2018).  effect of workstress and smoking towards sperm quality among infertile male.  - malaysian journal of public health medicine.  . 

farah hanan fathihah jaffar, khairul osman, siti fatimah ibrahim.  (2018).  pencirian fosfolipid & protein sperma lembu: pemisahan elektroforesis.  - .  100. 

syarifah faezah syed mohamad, siti fatimah ibrahim, nur hilwan ismail, khairul osman, farah hanan fathihah jaafar, chew fang nang & farida zuraina mohd yusof.  (2018).  quantification of hsp70 gene expression and determination of capacitation status of magnetically separated cryopreserved bovine spermatozoa at different thawing temperature and time.  - sains malaysiana.  . 

siti fatimah ibrahim.  (2018).  standardization of oocyte quality to assess spermatozoa fertilization capability in animal model.  - 32nd scientific meeting of malaysian society of pharmacology & physiology.  . 

lina s., eliza h., hashida n. h., ibrahim s. f., osman k..  (2018).  androgen receptor and ultrastructural features of nigella sativa oil and nicotine-treated male rat reproductive glands.  - sains malaysiana.  . 

dr. mohd heikal mohd yunus, dr. teoh seong lin, prof madya dr isa naina mohamed, prof madya dr siti fatimah ibrahim, dr. rosnah ismail.  (2018).  deafening silence.  - .  . 

khairul osman, rafeah pakri mohamed, mohd hashim omar, siti fatimah ibrahim, farah hanan fathihah jaafar.  (2017).  kesan merokok terhadap integriti dalam kalangan populasi melayu.  - sari penyelidikan.  40-41. 

khairul osman, siti fatimah ibrahim.  (2017).  advances in andrology assessment : from lab to iot.  - advancement in research for sustainable health.  . 

farah hanan fathihah jaffar, khairul osman, jaya kumar & siti fatimah ibrahim.  (2017).  effect of alcohol consumption on the sperm dna integrity : a systematic review.  - journal of agricultural science.  136-144. 

zulaiha a. rahman, siti fatimah ibrahim, nurul atikah osman, farah hanan fathihah jaffar & khairul osman.  (2017).  effect of energy substrate dynamics on mitochondrial activity and oxidative stress levels of in vitro maturing bovine oocytes.  - journal of agricultural science.  14-23. 

nur hilwani ismail, khairul osman, farida zuraina mohd yusof, syarifah faezah syed mohamad, farah hanan fathihah jaffar & siti fatimah ibrahim.  (2017).  improvement of post-thaw sperm kinematics and dna integrity of cross-bred bovine sperm by incorporating dgc as selection method prior to cryopreservation.  - journal of agricultural science.  24-31. 

khairul osman, noraina mohd bakri, farah hanan fathihah jaffar, nurul atikah osman & siti fatimah ibrahim.  (2017).  the effect of density gradient centrifugation and magnetic-activated cell sorting with the combination of both on bovine spermatozoa kinematics, viability and acrosome status.  - journal of agricultural science.  73-78. 

noraina mohd bakri, siti fatimah ibrahim, nurul atikah osman, nurhaslina hasan, farah hanan fathihah jaffar, zulaiha abdul rahman, khairul osman.  (2016).  embryo apoptosis identification: oocyte grade or cleavage stage?.  - saudi journal of biological sciences.  50-55. 

fayez a almabhouh, khairul osman, siti fatimah ibrahim, sergey gupalo, justin gnanou, effendi ibrahim, harbindar jeet singh.  (2016).  melatonin ameliorates the adverse effects of leptin on sperm.  - asian journal of andrology.  1-8. 

norhamizan hashim, khairul osman, siti fatimah ibrahim, rosliah harun & rafeah pakri mohamed.  (2016).  kesan psikostres terhadap kerosakan dna dan ketakormalan residu sitoplasma sperma manusia.  - sains malaysiana.  1931-1938. 

khairul osman, rafeah pakri mohamed, mohd hashim omar, siti fatimah ibrahim.  (2016).  smoking alters sperm chromatin intergrity and sperm count.  - 1st international research conference on engineering, science and humanities.  212-214. 

azizah ugusman, noralim a. othman, zahirah n. abdul razak, melissa m. soh, puteri n.a. kamal faizul, and siti f. ibrahim.  (2015).  assessment of learning environment among the first year malaysian medical students.  - journal of taibah university medical sciences.  454-460. 

noraina mohd bakri, khairul osman, nurul atikah osman, nurhaslina hasan, farah hanan fathihah jaffar & siti fatimah ibrahim.  (2015).  pengaruh pengkelasan sel telur terhadap kematian sel telur lembu tersenyawa.  - impak.  . 

norhamizan hashim, khairul osman, siti fatimah ibrahim & rosliah harun.  (2015).  adakah stres mempengaruhi ketaknormalan sperma manusia?.  - impak.  . 

noraina mohd bakri, khairul osman, nurul atikah osman, nurhaslina hasan, farah hanan fathihah jaffar & siti fatimah ibrahim.  (2015).  the influence of the egg cell grades toward the death of cattle fertilized egg cell.  - impact.  . 

norhamizan hashim, khairul osman, siti fatimah ibrahim & rosliah harun.  (2015).  stress contribute to abnormality of the human sperm?.  - impact.  . 

ismail m.i., osman k., ibrahim s.f., jaafar f.h.f., ghani n.a.a., zainalabidin f.a., othman a.m..  (2014).  development of single tubing-type canister for cryo-storage of bull semen and their effect on sperm motility and viability.  - brazilian archives of biology and technology.  194 - 199. 

s.s.m. faezah, f.m.y zuraina, j.h.f. farah, o.khairul, n.i. hilwani, m.i. iswadi, c.n. fang, i.zawawi, o.m. abas and s.i. fatimah.  (2014).  the effects of magnetic separation on cryopreserved bovine spermatozoa motility, viability and cryo-capacitation status.  - zygote.  22(3):378-386. 

khairul osman, nurhaslina hassan, siti fatimah ibrahim, chew fang nang & zawawi ismail.  (2013).  viability selection of bovine oocyte using annexin-v assay.  - journal of agricultural science.  5(6):141-145. 

siti fatimah ibrahim, athifah ariff johor, farahwahida othman, lee pei yee, mohamad firdaus yahaya, farah hanan fatihah jaafar, noraina mohd bakri & khairul osman.  (2013).  albumin-v: role in bovine spermatozoa viability, motility and membrane elasticity.  - journal of agricultural science.  5(3):83-89. 

noralim azhim o, zahirah nadiyah ar, melissa ms, nasyitah aina kf, azizah u and siti fatimah i.  (2013).  medical students` perceptions of the learning environment in universiti kebangsaan malaysia.  - 5th medical undergraduates` annual scientific research meeting.  . 

khairul osman , siti fatimah ibrahim , nor azlina zakaria , mohd iswadi ismail , amat aswadi abd karim and zawawi ismail.  (2012).  effects of alpha lipoic acids on cattle sperm kinetics using computer assisted semen analysis.  - research journal of biological sciences.  7(2) : 73-77. 

k osman, cf nang, sf ibrahim, sb budin, fhf jaffar, naa wahab.  (2012).  albumin improved spermatozoa quality and dna integrity for freezing-free preservation.  - international journal of biological & medical research.  3(2):1670-1679. 

c. f. nang, k. osman, s. b. budin, m. i. ismail, f. h. f. jaffar, s. f. s. mohamad & s. f. ibrahim.  (2012).  bovine serum albumin: survival and osmolarity effect in bovine spermatozoa stored above freezing point.  - andrologia.  44(S1):447-453. 

prof madya dr. hamidah hassan, cik satia subramaniam, puan muliati ismail, dr. faridah hussan, dr. zakiah jubri, dr. siti fatimah ibrahim.  (2011).  central nervous system.  - .  . 

siti fatimah ibrahim, farah hanan fathihah jaffar, khairul osman, syarifah faezah syed mohamed, chew fang nang, nur hilwani ismail, and mohd iswadi ismail.  (2011).  bull spermatozoa motility : optimization of coenzyme q10 and alpha-lipoic acid concentration.  - the iioab journal.  2(5):8-13. 

fatimah, is; iswadi, im; khairul, o; nurhazilah, m; fadzilah, ms; padzil, arm; srijit, d; mazni, oa.  (2010).  a preliminary study of reactive oxygen species activity within motile boer buck sperm using confocal laser scanning microscope (clsm).  - clinica terapeutica.  161(2):125-128. 

zahara abdul manaf, c.c lee, siti fatimah ibrahim, poh bee koon, khairul osman, srijit das, j. mohammad.  (2010).  plasma vitamin c and tocotrienols changes in response to dietary supplementation among young male adults.  - clinica terapeutica.  161(2):121-124.