The role of follicle stimulating harmone(FSH) in male reproductive function remains a matter of debate although recent evidences strongly suggest a role despite the controversies that arose following the results obtained with FSH-beta null mice and observations from human FSH receptor mutations. This review summarizes the recent developments of our understanding on the role of FSH in male repro...

Estradiol-treated, rat pituitary cells were studied to examine the effects of progesterone (P) on follicle-stimulating hormone (FSH) synthesis and secretion. Progesterone was administered prior to or concurrent with 3 h secretory challenges with either gonadotropin-releasing hormone (GnRH), the iontophore A23187, the protein kinase C activator phorbol 12,13-myristate (PMA), or no secretagogue. ...

A luteinizing hormone/follicle-stimulating hormone-releasing hormone (LH/FSH-RH) test was performed in 70 women with amenorrhoea or anovulatory infertility, or both, and a clomiphene stimulation test was also performed in 24 of these patients. Most patients responded to LH/FSH-RH with significant increases in LH and FSH. In women with gonadal dysgenesis or premature ovarian failure exaggerated ...

The benefit of ovarian superstimulation using exogenous FSH before ovum pick-up (OPU) and in vitro embryo production (IVEP) has been the subject conflicting results. objective present study, therefore, was to evaluate effect use dose porcine (p-FSH) OPU/IVEP on response pregnant heifers. Pregnant Holstein heifers (n = 48) were assigned randomly receive 0, 160, or 300 mg NIH-FSH-P1 a crossover d...

Preovulatory LH and FSH surges and the subsequent periovulatory FSH surge were studied in heifers treated with a single injection of GnRH (100 microg, n = 6) or saline (n = 7). Blood samples were collected every hour from 6 h before treatment until 12 h after the largest follicle reached > or =8.5 mm (expected beginning of follicular deviation). The GnRH-induced preovulatory LH and FSH surges w...

The action of follicle-stimulating hormone (FSH) in spermatogenesis is regulated at a fundamental level by controlling the number of competent receptors present at the surface of Sertoli cells. By controlling the number of receptors, the cell is able to modulate the timing and magnitude of subsequent signal transduction in response to FSH. One mechanism of control is the down-regulation of the ...

A protocol based on small doses of FSH was examined for the induction of double or triple (multiple) ovulations in cattle. Ovulation rate, follicular characteristics, and luteal responses were determined. In Exp. 1, three groups of estrous-synchronized, cyclic Holstein heifers were treated once daily, on d 3 to 6 of the cycle, with a FSH product (Folltropin-V): large FSH dose (total of 150 mg; ...

Objective: To study the changes of age-related serum Follicle Stimulating Hormone (FSH) level and Xray of knee joint and the relationship between FSH and postmenopausal knee osteoarthritis in postmenopausal women. Methods: 248 postmenopausal women aged over 50 y were randomly selected from Shandong Provincial Hospital affiliated with Shandong University after excluding patients with related dis...

FSH action on granulosa cells involves the generation of cAMP and subsequent activation of the cAMP-dependent protein kinase (PKA). The PKA holoenzyme is targeted to specific subcellular sites through the interaction of the regulatory subunits with A-kinase anchoring proteins (AKAPs). We previously reported that FSH regulates expression of AKAPs. In this report we examine the relationship betwe...

UNLABELLED BACKGROUND The FSH starting dose is usually chosen according to women's age, anamnesis, clinical criteria and markers of ovarian reserve. Currently used markers include antral follicle count (AFC), which is considered to have a very high performance in predicting ovarian response to FSH. The objective of the present study to elaborate a nomogram based on AFC for the calculation of...