menarche is the term for the onset of the first menstrual cycle.
menarche is the term for the onset of the first menstrual cycle.
what is the term for the onset of the first menstrual cycle?
menarche
menarche









































menarche ( ; greek: "mēn" "month" + "arkhē" "beginning") is the first menstrual cycle, or first menstrual bleeding, in female humans. from both social and medical perspectives, it is often considered the central event of female puberty, as it signals the possibility of fertility.
menarche
approximately two years after the onset of puberty (a girl's first menstrual cycle), estrogen and growth hormone stimulate the development and growth of the glandular fat and suspensory tissues that compose the breast. this continues for approximately four years until the final shape of the breast (size, volume, density) is established at about the age of 21. mammoplasia (breast enlargement) in girls begins at puberty, unlike all other primates in which breasts enlarge only during lactation.









































section::::development.:changes during the menstrual cycle.









































during the menstrual cycle, the breasts are enlarged by premenstrual water retention and temporary growth.









































section::::development.:pregnancy and breastfeeding.
breast