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. 

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, 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. 

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. 

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. 

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. 

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 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. 

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).  androgen effect on connexin expression in the mammalian female reproductive system: a systematic review.  - bosnian journal of basic medical sciences.  293-302. 

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. 

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, 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 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. 

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.  . 

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.  . 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

siti fatimah ibrahim, khairul osman, srijit das, abas mazni othman, norzaiti abdul majid, mohd padzil abdul rahman.  (2008).  a study of the antioxidant effect of alpha lipoic acids on sperm quality.  - clinics.  64(3):545-50. 

k. osman, s. ibrahim, m. ismail, s. das, m. abd rahman and a. othman.  (2008).  data mining: relationship of sperm kinetics and dna integrity.  - reproduction, fertility & development.  20 (S422) : 102.