CONTEXT Follicle-stimulating hormone (FSH)-secreting pituitary adenoma is usually a nonfunctioning tumor, but in rare cases it may develop into ovarian hyperstimulation. Several reports have revealed that serum FSH levels are normal to slightly high in patients with combined FSH-secreting pituitary adenoma with ovarian hyperstimulation. This finding is different from iatrogenic ovarian hypersti...

In the non breeding period, the effect of two superovulatory treatments (eCG/FSH in single dose or FSH alone in four decreasing doses) on the production of embryo quality following in vitro viability after vitrification procedures was investigated using forty-four adult Sarda breed ewes. In sheep treated with eCG/FSH, the mean number of corpora lutea was significantly (P < 0.05) higher (11.8+/-...

Imminent ovarian failure (IOF) in women is characterized by regular menstrual cycles and elevated early follicular phase FSH. This study explored underlying neuroendocrine causes of elevated FSH concentrations on day 3 of the menstrual cycle. The characteristics of episodic secretion of FSH and LH, the pituitary response to gonadotrophin-releasing hormone (GnRH), plasma oestradiol, and dimeric ...

OBJECTIVE To determine the effect of FSH doses on intracytoplasmic sperm injection (ICSI) outcomes according to the age of the patient. METHODS Patients undergoing controlled ovarian stimulation (COS) for ICSI cycles in a university-affiliated in vitro fertilization center were split into age groups: ≤35 y.o. (n=1523); >35 and ≤38 y.o. (n=652); >38 and ≤40 y.o. (n=332); and >40 y.o. (n=370). ...

INTRODUCTION Anti-Müllerian hormone represents the primitive follicular number and ovarian age. Low level of AMH is in relation to early menopausal state and decreased ovarian reserve. AMH level changes occur prior to FSH level in representing ovarian failure. The aim of this study is to compare sensitivity and specificity of AMH with FSH in diagnosis of POF. MATERIAL AND METHODS This descrip...

Testosterone-filled Silastic capsules were implanted into mature rams at the time of castration (wethers). After 6 weeks, a tonic pattern of FSH secretion was observed in rams, wethers and wethers implanted with testosterone. Castration caused serum concentrations of FSH to increase 4\p=n-\5-fold. Relatively low serum concentrations of testosterone (25\p=n-\50% of intact ram values) did not sig...

In this report, we review our present effort in the field of molecular reproductive endocrinology: to identify a small molecular weight follicle stimulating hormone (FSH) agonistic molecule. To achieve this goal we require a number of molecular tools. We have cloned and expressed the human gonadotrophin, FSH and the human FSH receptor and developed a reliable high throughput assay. We have also...

FSH is crucial for oocyte maturation and fertility and is the main component in infertility treatment in assisted reproduction. The granulosa cells expressing the FSH receptor interact with the oocyte and provide nourishing substrates controlling the oocyte maturation. Thus, transcriptome analysis of granulosa cells stimulated by FSH is of major importance in understanding the communication bet...

A highly purified follicle-stimulating hormone (FSH) preparation has been obtained from sheep pituitary glands by extraction with ethanol followed by fractionation with metaphosphoric acid and ammonium sulfate, gel filtration on Sephadex G-150, ion exchange chromatography on carboxymethyl Sephadex, hydroxylapatite chromatography, preparative acrylamide disc gel electrophoresis, and gel filtrati...

Porcine FSH (SUPER OV), containing .03% LH activity, and equine chorionic gonadotropin (eCG) were administered during an altrenogest-synchronized follicular phase to determine their effects on follicle development, estrus, ovulation, and fertilization. Treatments were made by i.m. injection starting on d 1 (24 h after the last feeding of altrenogest): 1) saline, once, n = 14; 2) eCG (1,200 to 1...