LH also enters the testes and stimulates the interstitial cells of Leydig to make and release testosterone into the testes and the blood. Yes No. Fertility is not attained until later in adolescence. Testosterone is responsible for the development of secondary sex characteristics, features that stimulate male development including characteristics that are not part of the reproductive system, such as facial hair growth and voice change.
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However, it is not unusual for puberty to begin as early as age 9 or to continue until age Puberty in Boys. From developing new therapies that treat and prevent disease to helping people in need, hormones that affect secondary sex characteristics for males in Alice Springs are committed to improving health and well-being around the world.
Effects of Aging on the Male Reproductive System. Biology of the Male Reproductive System. The chart shows a typical sequence and normal range of development for the milestones of sexual development. At the onset of puberty, the hypothalamus causes the release of FSH and LH into the male system for the first time.
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. Yes No. Follicle cells produce the hormone inhibin, which inhibits FSH production.
In boys, puberty usually occurs between the ages of 10 and 14 years. Delayed Puberty. Click here for the Professional Version.
These include breast development, flaring of the hips, and a shorter period necessary for bone maturation. Follicle-stimulating hormone plus testosterone causes the testes to produce sperm. Luteinizing hormone causes the testes to produce testosterone.