Hormones of FSH and LH belong to the gonadotropichormones that are peptide (glycoproteins with alpha and beta subunits) and are synthesized by gonadotropic cells of the anterior lobe of the pituitary gland. Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) take an active part in the human reproductive system - both women and men. In women, these hormones contribute to the stimulation of estrogen production, and when their number reaches the highest level, they stimulate ovulation. Also contribute to the growth of follicles on the ovaries.
How they work
If you take into account the menstrual cycle, thenthe phase that promotes the formation of follicles on the ovaries first acts. Further with the help of luteotropin from the follicles are released steroid hormones, which are called estrogens. They affect the proliferation of tissues and sexual functions. Normally this period lasts for 4 to 7 days. Then begins ovulation (the 14th day of the cycle of menstruation), during the day, fertilization takes place and the body prepares for pregnancy, or the premenstrual phase begins. This happens in this way: the follicle itself bursts, and the egg is ready for fertilization. All that is left of the follicle becomes a yellow body. The essence of pregnancy is implantation of a fertilized egg in the endometrium of the uterus. The yellow body itself also produces a steroid hormone - progesterone, which stops the pituitary activity.
Necessity of hormones
LH hormone is necessary for the existence of yellowbody for 14 days. In men, both of the above hormones contribute to spermatogenesis. LH hormone is needed to produce testosterone by influencing Leydig cells. Testosterone binds to the androgen-binding protein in the blood, it is he who is responsible for maintaining a high level of testosterone in the spermatogenic epithelium by transport in the lumen of the seminiferous tubules. There is a norm and pathology - and the hormone LH (its level) increases or decreases. The reason for this may be hyperfunction or hypofunction of the pituitary gland, amenorrhea in women, gonadal atrophy in men due to childhood mumps and a disease such as gonorrhea. In addition, the cause of hormonal dysfunction may be long-term use of cardiac glycosides or steroid drugs. Do not also exclude the delay in puberty and physical growth.
The urgency of the analysis
The analysis on a hormone LG(FIA). To conduct it, you need to collect venous blood. Before the analysis you can not smoke, eat, you can drink water, but a little. For 24 days you can not take steroid drugs or cardiac glycosides. This analysis is prescribed in the diagnosis of infertility. Of course, it is possible to conduct a genetic examination, but more detailed will be the conduct of this analysis. He is appointed to study the reproductive system of men and women (in the reproductive age and during the menopause), and it can also be conducted for girls in connection with premature puberty.
