Follicle growth and associated changes in circulating hormone concentrations were evaluated after follicle ablation in mares (n = 13) during four 13 day periods beginning at means of -98.5, -61.4, -26.0 and 10 days from the first ovulation and corresponding to mid-anovulatory, early-transitional, late-transitional and ovulatory periods, respectively. During each period, all follicles > 5 mm in ...

introduction: pulsatile injection of gnrh in hypothalamic amenorrhea is known to result in ovulation. the aim of this research was to study the effect of non pulsatile gnrh agonist administration on the ovaries of immature rats. material and methods: in this research the immature rats was divided to 7,17 and 27 daysand each were subdivided to four subgroups. subcutaneous injection every 12 hour...

The assembly of the developmentally arrested primordial follicle and the subsequent transition of the primordial follicle to the primary follicle are critical processes in normal ovarian physiology that remain to be elucidated. Ovarian follicles do not proliferate and the primordial follicles present in the neonate represent the total number of gametes available to a female throughout her repro...

PURPOSE This study attempted to derive an objective and sophisticated definition of poor ovarian response (POR). MATERIALS AND METHODS A total of 176 consecutive in vitro fertilization (IVF) cycles (137 patients) with conventional ovarian stimulation during 2009 to 2012 were studied by retrospective analysis. Optimal oocyte number (total or mature) was determined by statistics-based (distribu...

Ovulation is a precisely timed process by which a mature oocyte is released from an ovarian follicle. This process is initiated by the pituitary surge of luteinizing hormone (LH), is temporally associated with transcriptional regulation of numerous genes, and is presumed to involve the synthesis and/or activation of specific proteases that degrade the follicle wall. The progesterone receptor (P...

To explore the effect of different ovulation induction regimens on pregnancy outcome patients with endometriosis and infertility treated in vitro fertilization transplantation. From December 2016 to 2019, a total 324 were selected as subjects. After same treatment, three protocols (super long protocol, modified protocol antagonist protocol) studied retrospectively. Baseline, Gonadotropin dosage...

Aim: The aim of this study was to determine the effect paternal age on miscarriage rates in couples undergoing vitro fertilization/intracytoplasmic sperm injection treatment cycles. Material and Methods: Patients were classified into two groups. group consisted patients whose pregnancy resulted a (n=73) control which had live singleton birth (n=256). Demographic characteristics, indications, du...

Oocyte cytoplasmic maturation is influenced by the quantity of synthesized RNA and proteins accumulated and stored during growth. Transcriptional repression and degradation of transcripts occur during oocyte nuclear maturation, and prolonged transcriptional arrest might compromise RNA stores for early development. RNA quantification of key genes in oocytes might be valuable when setting up in v...