The Hormonal Control Of Oogenesis

Pregnancy is a complicated thing and it is successfully maintained by the joint action of many different hormones. Ovary meaning secretes four hormones, estrogen, progesterone, relaxin and inhibin. The Graafian follicle which is released every month during menstruation, if pregnancy does not  occur, also secrete estrogen and inhibin. Progesterone and relaxin are however secreted from the corpus luteum which develops if pregnancy is successful. These are only ovarian hormones. However all these hormones are further controlled by the secretion from the anterior pituitary.

Let us look into the detailed function of estrogen, progesterone and relaxin.

  • Estrogen: Stimulates the growth and maturation of ovarian follicles. Stimulates growth and development of ovaries, fallopian tubes, vagina, uterus, Bartholin gland etc. It also promotes the development of breast, before and after pregnancy and even after childbirth, broadening of the pelvis during pregnancy, deposition of adipose tissue in the abdominal area, high pitched voice etc. It promotes oogenesis, regulates ovulation and menstruation every month. Any problem or fluctuation in the estrogen hormone can result in complications of menstruation as well as of pregnancy. Estrogen also regulates the overall female sexual behavior.
  • Progesterone: Helps in the formation of placenta and supports pregnancy. It helps in the implantation of the embryo in the uterine endometrium properly. If the optimum level of progesterone fluctuates in a female during the implantation, it might result in complication and also miscarriage. Progesterone also acts on the mammary glands and hence stimulates the growth and development. Due to the major effect of progesterone the milk secretion is enabled and continued after childbirth. You’ll get many pregnancy tips Hindi about the importance of estrogen and progesterone hormone. Progesterone also inhibits the follicle stimulating hormone secretion, ovulation and hence suspense the menstrual cycle if there is a successful conception.
  • Relaxin: This hormone relaxes the cervix during parturition or child birth. It also relaxes the ligaments of pubic symphysis and makes it flexible and easier for the widening of the birth canal for a smooth delivery of the baby. This hormone is artificially injected if it is not produced in optimum amounts during labor or child birth.

Tips for pregnant women in Hindi tells us about the five hormones that regulate menstrual cycle. The gonadotropin-releasing hormone from the hypothalamus, the follicle stimulating hormone and luteinizing hormone from anterior pituitary, estrogen and progesterone from maturing follicle and corpus luteum. The gonadotropin-releasing hormone stimulates the release of follicle stimulating hormone which causes ovarian follicles to grow and to secrete estrogen. However the luteinizing hormone stimulates the conversion of a ruptured follicle into a corpus luteum which releases both estrogen as well as progesterone. However luteinizing hormone is the major element in causing ovulation, if pregnancy fails.

The liquor follicular which is present inside the Graafian follicle is rich in estrogen. The membrane granulosa and Corona radiate of the Graafian follicle perform the endocrine function in maturing follicles as well as secreting estrogen. The secondary oocyte is released from the ovary and enters into the fallopian tube, and if fertilization occurs it gets implanted into the uterus.

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