background: unovulation is the most common cause of infertility. the first line oral treatment has been clomiphene citrate. another anti-estrogen used for ovulation induction is tamoxifen. many unovulatory infertile women are resistance to anti-estrogens and need another treatment. alternative treatments are aromatas inhibitors. objective: this study was designed to compare the effectiveness of...

background: for more than four decades clomiphene citrate has been the first line of the treatment for ovulatory disorders. the aim of this study was to compare the effects of letrozole and clomiphene citrate on ovulation and pregnancy rate in patients with polycystic ovary syndrome.   methods: in this prospective double-blind study, 100 patients with polycystic ovary syndrome were randomized i...

The effects of ovulation induction in ussurian bullhead, Leiocassis ussuriensis, were investigated by treating ussurian bullhead with hCG, LHRHa, GnRHa, ovaprim, and pimozide. hCG was injected to ussurian bullhead at 0.75% NaCl, 5,000, 10,000, 20,000, and 30,000 IU, respectively. The ovulation inducement rates were 100% in 20,000 and 30,000 IU. Fertilization rates were 82.7% and 79.8%. Hatching...

Polycystic ovary syndrome is a common heterogeneous endocrine disorder in reproductive-age women, with prevalence around 4-12%. The present study was performed to investigate whether progesterone-induced endometrial bleed before ovulation induction affects pregnancy in patients with PCOS who underwent intrauterine insemination (IUI) treatment. A total of 241 IUI cycles were retrospectively anal...

Muscarinic receptors types 1 (m1AChR) and 2 (m2AChR) in the preoptic and anterior hypothalamus areas (POA-AHA) were counted, and the effects of blocking these receptors on spontaneous ovulation were analysed throughout the rat oestrous cycle. Rats in each phase of the oestrous cycle were assigned to the following experiments: (1) an immunohistochemical study of the number of cells expressing m1...