TitleAssistant Clinical Professor
Office BuildingAnimal Disease Research & Diagnostic Laboratory
Mailing AddressAnimal Disease Research 109
Veterinary & Biomedical Sciences-Box 2175
Brookings, SD 57007
BiographyDr. Aziz Siddiqui, DVM, MS, PhD is specialized in endocrinology and reproduction. He coordinates and teaches Integrated Biochemistry & Physiology courses in our professional (DVM) program of veterinary medicine (PPVM). A native of Bangladesh, Dr. Siddiqui has moved to USA in 2002 as a USDA J-1 research scholar, eventually completed pre- and post-doctoral training in endocrinology and reproductive physiology at the University of Wisconsin - School of Veterinary Medicine. Before coming to SDSU, Dr. Siddiqui taught anatomy and physiology at various campuses within the University of Wisconsin system. Prior to that he was the Andrology Laboratory Director at Accelerated Genetics – a large bull stud in Wisconsin. Dr. Siddiqui's research interest is andrology and embryology where he uses Doppler ultrasonography and Microscopy as primary clinical/research tool.
EducationPostdoc - Reproductive Biology, University of Wisconsin-Madison SVM, 2013
PhD - Theriogenology, Bangladesh Agril. University (in association with UW-Madison), 2008
PGT Certificate - Assisted Reproductive Technologies, University of Wisconsin-Madison, 2003
MS - Veterinary Obstetrics, Bangladesh Agricultural University, 2000
DVM - Bangladesh Agricultural University, 1998
Academic InterestsIntegrated Biochemistry and Physiology
Endocrinology and Reproduction
Histology and Embryology
Theriogenology Clinical Skills
Academic ResponsibilitiesCourse Coordinator - Anatomy, Integrated Biochemistry and Physiology
BIOL 476/576 Advanced Physiology
VET 602 Physiology I
VET 624 Physiology II
VET 603 Anatomy I (small animal)
VET 622 Anatomy II (large animal)
Committee ActivitiesChair, PPVM Curriculum Committee, 2022-present
Member, STG Technical Committee, ECTAD-FAO, Bangladesh, 2022-present
Member, SDSU DVM Admission Committee, 2021-present
Member, UW-Richland Undergraduate Research and Creativity Committee, 2016-2021
Member, NAAB/CSS Technical Committee, 2011-2013
Member, CSS Quality Control Competence & Compliance Committee, 2012-2013
Member, Recruitment and Hiring Committees
Thesis Supervisory and Dissertation Advisory Committees
Awards and HonorsInternational Consultant, QC Lab, Department of Livestock Services, Bangladesh, 2017-2020
Postdoctoral Research Scholar, Eutheria Foundation, WI, 2013-2016
International Consultant, Babcock Institute for International Dairy Research and Development, WI, 2004-2005
USDA J-1 Exchange Research Scholar, University of Wisconsin-School of Veterinary Medicine, 2002-2003
Professional MembershipsSociety for Theriogenology
Society for the Study of Reproduction
Bangladesh Veterinary Association
Work Experience2013–2021: Teaching Faculty, University of Wisconsin-Madison/Platteville/Baraboo/Richland, WI
2009–2013: Andrology Laboratory Director, Accelerated Genetics, WI
2006-2008: Research Program Manager, Eutheria Foundation, WI
2000–2006: Veterinary Surgeon, Department of Livestock Services, Bangladesh
1998–2000: Scientific Officer, Bangladesh Agricultural University, Bangladesh
Creative ActivitiesPeer Reviewed Publications of Creative Works:
(43) Ginther OJ, Siddiqui MAR, Araujo ER, Dangudubiyyam SV, 2017. Follicles and gonadotropins during waves 2 and 3 in three-wave interovulatory intervals in Bos taurus heifers. Theriogenology. 104:192– 197.
(42) Ginther OJ, Domingues RR, Siddiqui MAR, Dangudubiyyam SV, 2017. Blood flow and echotextural differences between the future dominant and subordinate follicles before the beginning of diameter deviation in heifers. Theriogenology. 100: 42–49.
(41) Ginther OJ, Siddiqui MAR, Baldrighi JM, Araujo ER, 2017. An intraovarian mechanism that enhances the effect of an FSH surge on recovery of subordinate follicles in heifers. Domestic Animal Endocrinology. 59: 67–74.
(40) Ginther OJ, Siddiqui MAR, Baldrighi JM, Wolf CA, Castro T, 2016. Temporality of two-way functional coupling between FSH and follicles in heifers. Theriogenology. 86: 1645–1653.
(39) Baldrighi JM, Siddiqui MAR, Ginther OJ, 2016. Temporal relationships between minor, preovulatory, or periovulatory FSH surges and the emergence and development of 2-mm follicles of wave 1 in Bos taurus heifers. Domestic Animal Endocrinology. 57: 80–84.
(38) Ginther OJ, Baldrighi JM, Siddiqui MAR, Araujo ER, 2016. Complexities of follicle deviation during selection of a dominant follicle in Bos taurus heifers. Theriogenology. 86: 2012–2019.
(37) Ginther OJ, Siddiqui MAR, Baldrighi JM, 2016. Functional Angiocoupling between follicles and adjucent corpus lueum in heifers. Theriogenology. 86: 465–471.
(36) Ginther OJ, Baldrighi JM, Siddiqui MAR, Wolf CA, 2016. Characteristics and functions of a minor FSH surge near the end of an interovulatory interval in Bos taurus heifers. Domestic Animal Endocrinology. 56: 63–69.
(35) Castro T, Oliveira FA, Siddiqui MAR, Baldrighi JM, Wolf CA, Ginther OJ, 2016. Stimulation of LH, FSH, and luteal blood flow by gonadotropin-releasing hormone during the luteal phase in mares. Theriogenology. 85: 740–746.
(34) Ginther OJ, Baldrighi JM, Siddiqui MAR, Bashir ST, Rakesh HB, 2016. Mechanism for greater frequency of contralateral than ipsilateral relationships between corpus luteum and ovulatory follicle for wave 3 in heifers. Theriogenology, 85: 361–367.
(33) Ginther OJ, Siddiqui MAR, Baldrighi JM, Hoffman MM, 2016. Stimulation of regressing subordinate follicles of wave 2 with a gonadotropin product in heifers. Domestic Animal Endocrinology, 55: 46–51.
(32) Ginther OJ, Siddiqui MAR, Baldrighi JM, Wolf CA, 2016. Systemic effect of follicle-stimulating hormone and intraovarian effect of the corpus luteum on complete regression versus recovery of regressing wave-2 follicles in heifers. Domestic Animal Endocrinology, 55: 51–59.
(31) Ginther OJ, Siddiqui MAR, Baldrighi JM, Wolf CA, 2015. Persistence and recovery of regressing 3-mm ovarian follicles in heifers. Theriogenology, 84: 1463–1471.
(30) Ginther OJ, Siddiqui MAR, Baldrighi JM, Wolf CA, Greene JM, 2015. Differences between follicular waves 1 and 2 in patterns of emergence of 2-mm follicles, associated FSH surges, and ovarian vascular perfusion in heifers. Theriogenology. 84: 853–861.
(29) Siddiqui MAR, Baldrighi JM, Greene JM, Wolf CA, Ginther OJ, 2015. Spontaneous and experimental conversion of a regressing subordinate follicle of wave 1 to the dominant follicle of wave 2 in heifers. Theriogenology 83: 1352–1359.
(28) Ginther OJ, Siddiqui MAR, Baldrighi JM, 2015. Effects of conversion of follicular activity from wave 1 to wave 2 and proximity of wave-2 follicles to CL in heifers. Theriogenology 83: 1241 – 1248.
(27) Ginther OJ, Siddiqui MAR, Baldrighi JM, Hoffman MM, 2015. Conversion of intraovarian patterns from preovulation to postovulation based on location of dominant follicle and corpus luteum in heifers Theriogenology 83:153–161.
(26) Siddiqui MAR, Ginther OJ, 2014. Switching of largest follicle from dominant to subordinate status when follicle and CL are in same ovary in heifers. Theriogenology, 82: 259–265.
(25) Ginther OJ, Siddiqui MAR, Baldrighi JM, Hoffman MM, 2014. Intraovarian factors associated with switching of a future dominant follicle to a subordinate follicle during induced luteolysis in heifers. Theriogenology. 83: 786–796.
(24) Ginther OJ, Siddiqui MAR, Baldrighi JM, Hoffman MM, 2014. Effect of intraovarian proximity between dominant follicle and corpus luteum on dimensions and blood flow of each structure in heifers.. Theriogenology 82:875–883.
(23) Siddiqui MAR, Das Z, Bhottacharjee J, Islam MM, Haque MA, Parrish JJ, Shamsuddin M, 2013. Factors affecting the first service conception rate of cows in smallholder dairy farms in Bangladesh. Reproduction in Domestic Animals. 48: 500–505.
(22) Hannan MA, Fuenzalida MJ, Siddiqui MAR, Shamsuddin M, Beg MA, Ginther OJ, 2010. Diurnal variation in LH and temporal relationships between oscillations in LH and progesterone during the luteal phase in heifers. Theriogenology, 74: 1491–1498.
(21) Siddiqui MAR, Ferreira JC, Gastal EL, Beg MA, Cooper DA, Ginther OJ, 2010. Temporal relationships of the LH surge and ovulation to echotexture and power-Doppler signals of blood flow in the wall of the preovulatory follicle in heifers. Reproduction, Fertility and Development, 22: 1110–1117.
(20) Shahiduzzaman AKM, Beg MA, Palhao MP, Siddiqui MAR, Shamsuddin M, Ginther OJ, 2010. Stimulation of the largest subordinate follicle by intrafollicular treatment with insulin-like growth factor 1 is associated with inhibition of the dominant follicle in heifers. Theriogenology, 74: 194–210.
(19) Shrestha HK, Beg MA, Siddiqui MAR, Ginther OJ, 2010. Dynamic progesterone responses to simulation of a natural pulse of a metabolite of prostaglandin F(2alpha) in heifers. Animal Reproduction Science, 118: 118–123.
(18) Siddiqui MAR, Gastal EL, Gastal MO, Almamun M, Beg MA, Ginther OJ, 2009. Relationship of vascular perfusion of the wall of the preovulatory follicle to in vitro fertilisation and embryo development in heifers. Reproduction, 137: 689–697.
(17) Siddiqui MAR, Almamun M, Ginther OJ, 2009. Blood flow in the wall of the preovulatory follicle and its relationship to pregnancy establishment in heifers. Animal Reproduction Science, 113: 287–292.
(16) Ginther OJ, Siddiqui MAR, Beg MA, 2009. Progesterone responses to intravenous and intrauterine infusions of prostaglandin F2alpha in mares. Reproduction, Fertility and Development, 21: 688–695.
(15) Siddiqui MAR, Gastal EL, Ju JC, Gastal MO, Beg MA, Ginther OJ, 2009. Nuclear configuration, spindle morphology and cytoskeletal organization of in vivo maturing horse oocytes. Reproduction in Domestic Animals, 44: 435–440.
(14) Ginther OJ, Siddiqui MAR, Beg MA, 2009. Physiologic and nonphysiologic effects of exogenous prostaglandin F2alpha on reproductive hormones in mares. Theriogenology, 72: 417–124.
(13) Siddiqui MAR, Gastal EL, Gastal MO, Beg MA, Ginther OJ, 2009. Effect of hCG in the presence of hCG antibodies on the follicle, hormone concentrations, and the oocyte in mares. Reproduction in Domestic Animals, 44: 474–479.
(12) Ginther OJ, Gastal MO, Gastal EL, Jacob JC, Siddiqui MAR, Beg MA, 2008. Effects of age on follicle and hormone dynamics during the oestrous cycle in mares. Reproduction, Fertility and Development, 20: 955–963.
(11) Siddiqui MAR, Bhattacharjee J, Das ZC, Islam MM, Islam MA, Haque MA, Parrish JJ, Shamsuddin M. 2008. Crossbred bull selection for bigger scrotum and shorter age at puberty with potentials for better quality semen. Reproduction in Domestic Animals, 43: 74–79.
(10) Ginther OJ, Gastal EL, Gastal MO, Siddiqui MAR, Beg MA, 2007. Relationship of follicle versus oocyte maturity to ultrasound morphology, blood flow and hormone concentrations of the preovulatory follicle in mares. Biology of Reproduction, 77: 202–208.
(9) Islam MM, Siddiqui MAR, Haque MA, Baki MA, Majumder S, Parrish JJ, Shamsuddin M, 2007. Screening some major communicable diseases of AI bulls in Bangladesh. Livestock Research for Rural Development, 19 (6) 2007. Available online at http://www.lrrd.org/lrrd19/6/isla19079.html
(8) Al-Faruque MH, Bari FY, Siddiqui MAR, Shamsuddin M, 2007. Fertilizing capacity of buck (Capra hircus) semen frozen with different concentrations of egg yolk. Journal of the Bangladesh Agricultural University, 5: 95–104.
(7) Bhattacharjee J, Siddiqui MAR, Das ZC, Khan AHMSI, Hossain M, Shamsuddin M, 2006. Spermiogram of German Shepherd Dog. Bangladesh Veterinary Journal, 40: 17–20.
(6) Shamsuddin M, Hossein MS, Siddiqui MAR, and AHMSI Khan, 2005. Use of dye deposition in cows’ excised genital tract to evaluate inseminators’ and refreshment training to improve their skills. Korean Journal of Embryo Transfer, 20: 157–162.
(5) Hossoin SMA, Siddiqui MAR, Shamsuddin M, Ahmed JU, 2004. Efficacy of dry cow therapy in mastitis control strategy. Bangladesh Veterinary Journal, 38: 105–112.
(4) Datta S, Chowdhury MK, Siddiqui MAR, Karim MJ, 2004. A retrospective study on field disease investigation in ruminants. Bangladesh Veterinary Journal, 38: 25–33.
(3) Choudhury MK, Hossein MS, Siddiqui MAR, Karim MJ, 2003. Clinical investigation of diseases and disorders encountered in the Upazilla Veterinary Hospital. Bangladesh Veterinary Journal, 37: 19–27.
(2) Siddiqui MAR, Shamsuddin M, Bhuiyan MMU, Akbar MA, Kamaruddin KM, 2002. Effect of feeding and body condition score on multiple ovulation and embryo production in zebu cows. Reproduction in Domestic Animals, 37: 37–41.
(1) Khan AHMSI, Hossein MS, Siddiqui MAR, Shamsuddin M, Bhuiyan MMU, Kamaruddin KM, 2000. Dose-specific effects of pregnant mare’s serum gonadotrophin on the embryo production in Bangladeshi zebu cows. The Bangladesh Veterinarian, 17: 67–73.
Area(s) of ResearchFood Animal Reproduction (herd and stud fertility)
Biology of Gonads & Gametes
Assisted Reproductive Technologies
Nuclear & Membrane Physiology of Sperm/Oocyte
Doppler Ultrasonography & Fluorescent Microscopy