Reproduction is the process by which organisms make more organisms like themselves. But even though the reproductive system is essential to keeping a species alive, unlike other body systems, it's not essential to keeping an individual alive. In the human reproductive process, two kinds of sex cells, or gametes GAH-meetzare involved.
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Puberty is the process of physical changes through which a child 's body matures into an adult body capable of sexual reproduction. It is initiated by hormonal signals from the brain to the gonads : the ovaries in a girl, the testes in a boy. In response to the signals, the gonads produce hormones that stimulate libido and the growth, function, and transformation of the brain, bonesmusclebloodskinhairbreastsand sex organs.
The external female genital area is called the vulva. The outer folds of skin are called the labia majora, and the inner folds are called the labia minora. Within the labia minora is the vestibule.
Here's an overview of the major physical changes girls can expect as they go through puberty:. Girls usually begin puberty between the ages of 8 and 13 years old. The earliest sign of puberty in most girls is the development of breast "buds," nickel-sized bumps under the nipple.
In the first stage of puberty which often occurs sometime between the ages of 8 and 11the only signs of puberty are occurring inside the body, as ovaries react to hormones such as LH and FSH and begin developing estrogen-producing capabilities. The second stage of puberty generally takes place when a girl is 11 or Breasts begin to grow, or "bud.
Vaginal discharge in prepubescent girls is not an uncommon problem in pediatric outpatient practice. Among its various etiologies, foreign body lodgement is quite frequent in this age group. Diagnosis is sometimes forthcoming after history and physical exam, and the removal of the foreign object is followed by a prompt resolution of symptoms.
Nearly all the organ systems in the human body begin to grow and develop after birth. However, the reproductive system remains inactive for several years. While it is dormant, the brain secretes very small amounts of reproductive hormones gonadotrophinspreventing any sexual development from occurring.