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Browsing Center for Research in Reproduction and Contraception by Author "Wreford, Nigel G."
Now showing items 1-3 of 3
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Immature spermatids are not prevalent in semen from men who are receiving androgen-based contraceptive regimens
Matsumoto, Alvin M.; Bremner, William J.; McLachlan, Robert I.; Anawalt, Bradley D.; Zhengwei, Yang; Wreford, Nigel G. (Elsevier, 1998-01)OBJECTIVE: To determine whether immature spermatids increase in semen in response to hormonal contraceptive treatments. Such a finding would support the existence of a defect in spermiogenesis, which in turn ... -
Impairment of Spermatogonial Development and Spermiation after Testosterone-Induced Gonadotropin Suppression in Adult Monkeys (Macaca fascicularis)
Gu, Yi-Qun; Bremner, William J.; Balourdos, Georgia; McLachlan, Robert I.; Robertson, David M.; Wreford, Nigel G.; O'Donnell, Liza; Narula, Anita (The Endocrine Society, 2001-04)Human male hormonal contraceptive regimens do not consistently induce azoospermia, and the basis of this variable response is unclear. This study used nine adult macaque monkeys (Macaca fascicularis) given ... -
Quantitative (stereological) study of the normal spermatogenesis in the adult monkey (Macaca fascicularis)
Wreford, Nigel G.; Bremner, William J.; Zhengwei, Yang; McLachlan, Robert I. (American Society of Andrology, 1997-11)Germ cell and Sertoli cell numbers were estimated in six normal adult monkeys (Macaca fascicularis) using a contemporary unbiased and efficient stereological method--the optical disector. The data was used ...