background: asparagus is a plant with high nutritional, pharmaceutical, and industrial values. objective: the present study aimed to evaluate the effect of aqueous extract of asparagus roots on the hypothalamic-pituitary-gonadal axis hormones and oogenesis in female rats. materials and methods: in this experimental study, 40 adult female wistar rats were divided into five groups, which consist ...

Vitellogenic stage carp ovaries were collected aseptically and the cells of ovarian follicles were dispersed by trypsin treatment and cultivated as monolayer. Control cultures were grown in medium M199 alone. Media for experimental cultures were supplemented either with 100 µl ml-1 of CPH and CPS-carp GnRH (cultivated pituitary cell secretion affected by 10-6, 10-8, 10-10 M carp GnRH). The dire...

Background: The growth factors that drive the division and differentiation of stem cells during early human embryogenesis are unknown. The secretion of endorphins, progesterone (P(4)), human chorionic gonadotropin, 17beta-estradiol, and gonadotropin-releasing hormone by trophoblasts that lie adjacent to the embryoblast in the blastocyst suggests that these pregnancy-associated factors may direc...

Background and Objectives: Through out the history, medicinal plants have had great importance. Date palm is a species of phoenix Dactylifera and a genus of palamse. The pollen of date palm contains five chemical compounds. Quercetin, Rutin, Beta-Amyrin,Beta-Sitosterol and Uronic –Acid. Four of these compounds have biological activities. The present study aim was to determin of the effects of d...

Gonadotropin-releasing hormone (GnRH) regulates secretion of both of the gonadotropins, luteinizing hormone (LH) and follicle-stimulating hormone. Thus, it is a key hormone for vertebrate reproduction. GnRH was considered to be unusual among hypothalamic neuropeptides in that it appeared to have no direct antagonist, although some neurochemicals and peripheral hormones (opiates, GABA, gonadal s...

IT is well known that the human glycoprotein hormone family is comprised of four members: thyro-tropin (TSH) and gonadotropin (Gn), which includes follicle stimulating hormone (FSH), luteinizing hormone (LH) and chorionic gonadotropin (CG) [1, 2]. As shown in Fig. 1, synthesis and secretion of TSH, FSH and LH from the pituitary gland are regulated by the hypothalamic releasing hormones, thyrotr...

Globally, fish production in the wild is decreasing, and different aquaculture systems are presently being used for broodstock development captivity. Seasonally, raised captivity exhibit form of reproductive dysfunction at level brain-pituitary-gonad (BPG) axis. Primarily, vitellogenic completion final oocyte maturation inhibited females, males fail to spermiate spontaneously Reproductive dysfu...

Aim: Alterations in thyroid function with a simultaneous increase of hCG in some pregnancy diseases have been reported. However, the relationship between thyroid hormones and hCG during preeclampsia is not yet evaluated. In this study we determined serum levels of hCG, TSH, free T3 (fT3) and free T4 (fT4) in normal pregnant woman and in patients with preeclampsia and evaluated the correlation b...