What is the onset of reproductive age?
What is the onset of reproductive age?
Menarche is the onset of menstruation. The average age for menarche in the United States is now 12.8 years. Menarche is preceded by puberty-induced body changes that occur between ages 9 and 16 years. The age at which menarche occurs is affected by genetic and environmental factors.
What controls the maturation and development of male characteristics?
Three hormones are the principle regulators of the male reproductive system: follicle-stimulating hormone (FSH) stimulates spermatogenesis; luteinizing hormone (LH) stimulates the production of testosterone; and testosterone stimulates the development of male secondary sex characteristics and spermatogenesis.
What causes menarche?
Menarche is the result of complex interactions between the hypothalamic, pituitary, and ovarian hormones. It also can be affected by the thyroid, adrenal, and pancreatic hormones.
What is the role of male hormones in reproduction?
Male reproductive hormones, such as testosterone, help develop and maintain male sex characteristics and help make sperm in the testes. Some reproductive hormones may also be made in the laboratory and used to treat certain medical conditions.
How long should menarche last?
Normal Menstrual Cycles in Adolescent Girls
| Menarche (median age): | 12.43 years |
|---|---|
| Mean cycle interval: | 32.2 days in first gynecologic year |
| Menstrual cycle interval: | Typically 21–45 days |
| Menstrual flow length: | 7 days or less |
| Menstrual product use: | Three to six pads or tampons per day |
What happens to the body during menarche?
You’ve begun to develop breasts, pubic hair, and underarm hair. And your hips have begun to widen. Menarche also means that if you have sex, you can get pregnant. You can even get pregnant in the month before your first period starts.
How is sexual maturity a sign of maturity?
Sexual maturity is brought about by a maturing of the reproductive organs and the production of gametes. It may also be accompanied by a growth spurt or other physical changes which distinguish the immature organism from its adult form. Click to see full answer. Consequently, which is a sign of reproductive maturity?
Which is the best definition of reproductive maturity?
What is reproductive maturity? Sexual maturity is the capability of an organism to reproduce. Sexual maturity is brought about by a maturing of the reproductive organs and the production of gametes.
What are the causes and consequences of early puberty?
While they aren’t necessarily causes, a number of things are linked to early puberty. They include: Gender. Girls are 10 times as likely to have central precocious puberty as boys. Genetics. Sometimes, genetic mutations that trigger the release of sex hormones can lead to precocious puberty.
What causes gonadotropin independent precocious puberty?
This form of early puberty is also called gonadotropin-independent precocious puberty. In peripheral precocious puberty, the abnormality is not in the brain but in the testicles, ovaries, or adrenal glands, causing overproduction of sex hormones, like testosterone and estrogens. Peripheral precocious puberty may be caused by 2 :