Description
A steroid hormone produced in the adrenal cortex, ovaries, testes, and peripheral tissues. In the female body, estradiol ensures the proper formation of the reproductive system, the development of secondary sexual characteristics, and the regulation of menstrual function.
The level of estradiol in the blood depends on the phase of the menstrual cycle. At the beginning of the cycle, the estradiol concentration increases slowly. The highest level of estradiol is observed in the middle of the cycle; ovulation occurs at the peak concentration. In the second half of the cycle, the hormone level decreases until the end of the luteal phase. Estradiol concentration also decreases with age. The hormone is capable of exerting a stimulating effect on the growth of bone tissue, increasing calcium resorption, and reducing the excretion of sodium and water by the kidneys.
Testing of blood estradiol levels is used to diagnose menstrual cycle disorders, infertility, and disorders of sexual development.
Period of execution
By 9 hours. The specified time does not include the day of biomaterial collection