Undifferentiated embryonic tissues develop into different structures in male and female fetuses. The control of reproduction in females is more complex. These secondary sex characteristics include a deepening of the voice, the growth of facial, axillary, and pubic hair, and the beginnings of the sex drive.
As the follicles increase in size, they begin to release estrogen and a low level of progesterone into the blood. Inhibin is produced by Sertoli cells when the sperm count exceeds set limits. Which reproductive system is more complex, a man's or a woman's?
What is the reproductive system? Estrogen levels are highest right before the LH surge begins. The Menstrual Cycle : The menstrual cycle is controlled by the endocrine system, with distinct phases correlated to changes in hormone concentrations. Clinics in Rheumatic Diseases.
Testosterone and DHT are important for sexual development as well as secondary sexual characteristics such as thick skin and male-pattern hair growth. Luteal Phase The luteal phase begins with the formation of the corpus luteum stimulated by FSH and LH and ends in either pregnancy or luteolysis.
Estrogen is the reproductive hormone in females that assists in endometrial regrowth, ovulation, and calcium absorption; it is also responsible for the secondary sexual characteristics of females. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.
LH also enters the testes and stimulates the interstitial cells of Leydig to make and release testosterone into the testes and the blood. In females, FSH stimulates development of egg cells, called ova, which develop in structures called follicles.
A diagram follows : The effect of estrogen in body : Here, we can see estrogen is responsible for all the secondary female sexual characteristics. Sertoli cell cell in seminiferous tubules that assists developing sperm and makes inhibin. A diagram follows :.