Reproductive hormones

Male reproductive health has experienced a substantial global decline. This meta-analysis was conducted to investigate the influence of different dietary patterns on male reproductive function based on semen parameters, sperm DNA fragmentation, and sex hormones.

13p viengfa 29-09-2024 2 1   Download

Clarifying the fluctuation of steroid hormone levels in the blood plasma of rabbitfish Siganus guttatus (Bloch, 1787) during the spawning cycle as a basis for studies on artificial reproduction of rabbitfish in particular and marine fish in general.

27p unforgottennight02 20-08-2022 11 3   Download

Identify biological characteristics, some indicators of physiological and biochemical blood and urine of civets in captivity; determine the change in sex hormones of female civets and evaluate the effect of sexual stimulation on the fertility of civets in captivity in order to preserve herd in the direction of quantity development.

27p larachdumlanat129 20-01-2021 23 3   Download

Present study was conducted to explore the effect of milking temperament on milking attributes like milk let down time, milking time, milk flow rate, milk yield, composition in relation to plasma cortisol level and reproductive performance in Sahiwal cows. The experiment was carried out on 88 lactating healthy Sahiwal cows in hot- humid (38) and winter (58) season. The milking temperament was scored and the cows were grouped as docile and restless.

7p nguaconbaynhay5 16-05-2020 17 3   Download

Fecal steroid assays have been used to provide information on the estrous cycle, pregnancy, re-estrus, reproductive season and therapeutic treatments of an expanded list of species. This same method could be used in monitoring the reproductive status of the common palm civets (Paradoxurus hermaphroditus), also called toddy cats, a nocturnal omnivorous mammal found in South east Asia in general and Vietnam in particular.

8p shiwo_ding7 05-06-2019 4 0   Download

The isoprenoid methyl farnesoate (MF) has been implicated in the regulation of crustacean development and reproduction in conjunction with eyestalk molt inhibiting hormones and ecdysteroids. Farnesoic acid O-methyltransferase (FAMeT) catalyzes the methylation of farnesoic acid (FA) to produce MF in the terminal step of MF synthesis. We have previously cloned and characterized the shrimp FAMeT. In the present study, recombinant FAMeT (rFAMeT) was produced for bioassay and antiserum generation.

9p research12 01-06-2013 41 3   Download

Juvenile hormones (JHs) of insects are sesquiterpenoids that regulate a great diversity of processes in development and reproduction. As yet the molecular modes of action of JH are poorly understood. TheMethoprene-tolerant (Met) gene of Drosophila melanogasterhas been found to be responsible for resistance to a JH analogue (JHA) insecticide, methoprene. Previous studies onMethave implicated its involvement in JH signaling, although direct evidence is lacking.

0p awards 05-04-2013 33 1   Download

The crustacean hyperglycemic hormone (CHH) plays an important role in the regulation of hemolymph glucose levels, but it is also involved in other functions such as growth, molting and reproduction. In the present study we describe the first CHH family gene isolated from the Atlantic Ocean shrimp Litopenaeus schmitti.

9p inspiron33 23-03-2013 43 4   Download

Gonadotropin-releasing hormone (GnRH) I and II are hypothalamic deca-peptides with pivotal roles in the development of reproductive competence and regulation of reproductive events. In this study, transcriptional regula-tion of the human GnRH IIgene was investigated.

12p galaxyss3 19-03-2013 29 4   Download

One of the important peptide hormones that control reproduction in crus-taceans is gonad-inhibiting hormone (GIH). GIH is known to modulate gonad maturation by inhibiting synthesis of vitellogenin (Vg), the precursor of yolk proteins. In this study, a cDNA encoding a GIH (Pem-GIH) from the eyestalk of Penaeus monodonwas cloned using RT-PCR and RACE techniques.

11p media19 06-03-2013 22 4   Download

Although the crustacean crustacean hyperglycemic hormone⁄molt-inhibi-ting hormone⁄gonad-inhibiting hormone neuropeptides have been studied extensively in the last two decades and several neuropeptides from the shrimpMetapenaeus ensishave been cloned, the functions of most of these neuropeptides remained putative.

11p media19 04-03-2013 42 2   Download

Gonadotropin-releasing hormone (GnRH) has historically been known as a pituitary hormone; however, in the past few years, interest has been raised in locally produced, extrapituitary GnRH. GnRH receptor (GnRHR) was found to be expressed in normal human reproductive tissues (e.g. breast, endometrium, ovary, and prostate) and tumors derived from these tissues.

17p vinaphone15 28-02-2013 38 1   Download

As the key regulator of reproduction, gonadotropin-releasing hormone (GnRH) is released by neurons in the hypothalamus, and transported via the hypothalamo-hypophyseal portal circulation to the anterior pituitary to trigger gonadotropin release for gonadal steroidogenesis and gametogene-sis.

21p vinaphone15 28-02-2013 46 3   Download

GMP synthetase is a glutamine amidotransferase that incorporates ammo-nia derived from glutamine into the nucleotide xanthosine 5¢-monophos-phate (XMP) to form guanosine 5¢-monophosphate (GMP). Functional coordination of domains in glutamine amidotransferases leads to upregula

13p cosis54 09-12-2012 38 3   Download

The peptide hormones of the anterior pituitary are essential for the regulation of growth and development, reproduction, responses to stress, and intermediary metabolism. Their synthesis and secretion are controlled by hypothalamic hormones and by hormones from the peripheral endocrine organs. A large number of disease states as well as a diverse group of drugs also affect their secretion.

260p vanass 01-04-2011 100 11   Download

Role of the hypothalamic-pituitary-gonadal axis in the etiology of amenorrhea. Gonadotropin-releasing hormone (GnRH) secretion from the hypothalamus stimulates follicle-stimulating hormone (FSH) and luteinizing hormone (LH) secretion from the pituitary to induce ovarian folliculogenesis and steroidogenesis. Ovarian secretion of estradiol and progesterone controls the shedding of the endometrium, resulting in menses and, in combination with the inhibins, provides feedback regulation of the hypothalamus and pituitary to control secretion of FSH and LH.

5p konheokonmummim 30-11-2010 89 4   Download