ANOVULATORY infertility is sometimes associated with an abnormal degree of hirsutism and, very occasionally, with more serious manifestations of virilization. In such cases it is usually possible to demonstrate excessive concentrations of androgenic steroids but these steroids may be derived from either the ovary or the adrenal cortex or from both these sources. This subject has been reviewed r...

BACKGROUND It is not clear why some anovulatory women with polycystic ovary syndrome (PCOS) and obesity resume ovulation and others remain anovulatory after weight loss. The objective of this study was to compare the changes in body fat distribution and specifically intra-abdominal fat (IAF) and subcutaneous abdominal fat (SAF) between a group of anovulatory women with PCOS and obesity who resu...

We present the case of a 44-year-old nulliparous woman who experienced irregular menstrual cycles for about 10 years and developed both pituitary prolactinoma and endometrioid endometrial carcinoma. In premenopausal women, hyperprolactinemia causes hypogonadism by inhibiting secretion of gonadotropin-releasing hormone and thus suppressing luteinizing hormone levels, which can cause menstrual di...

The physiologic breeding season of horses extends from April to October in the Northern Hemisphere. Mares are polyestrous in that they exhibit repeated estrous cycles during the breeding season. In the winter months, 80% or more of mares enter a prolonged anovulatory phase referred to as winter anestrus. The onset of the transition period may be defined as the first significant increase in foll...

BACKGROUND Polymorphisms at codons 307 and 680 are the most commonly encountered allelic variants of the follicle-stimulating hormone receptor (FSHR) gene. Studies in Caucasians suggest that certain FSHR variants are more common in women with polycystic ovary syndrome (PCOS) than normal women. The objective of this study was to determine the distribution of FSHR gene polymorphisms at codons 307...

The mare is seasonally polyestrus, having an anovulatory period during the short light days of late fall and early winter, and beginning to ovulate as the days become longer during the winter. The complete estrus cycle is typically about 3 weeks, with 5 to 7 days of estrus and approximately 2 weeks of diestrus. When a mare lives within the natural social structure of the horse, i.e. a family ba...

OBJECTIVE To determine possible prediction of regular menses with aging in anovulatory women with polycystic ovary syndrome (PCOS). DESIGN Cohort. SETTING Academic practice. PATIENT(S) A total of 54 anovulatory women with PCOS and 28 age- and weight-matched control subjects. INTERVENTION(S) Blood and ovarian ultrasound at baseline and after 5 years. MAJOR OUTCOME MEASURE(S): Serum antim...

The Catalonian donkey breed is in danger of extinction, and much needs to be learned about the reproductive features of its females if breeding and conservation programmes are to be successful. This study reports the oestrous behaviour, oestrus cycle characteristics and dynamic ovarian events witnessed during 50 oestrous cycles (involving 106 ovulations) in 10 Catalonian jennies between March 2...

Angus x Hereford heifers were used to determine endocrine and ovarian function preceding nutritionally induced anovulation. Six heifers were fed to maintain body condition score (M), and 12 heifers were fed a restricted diet (R) until they became anovulatory. Starting on d 13 of an estrous cycle, heifers were given PGF2alpha every 16 d thereafter to synchronize and maintain 16 d estrous cycles....