Use -arche to build a word that means beginning of menses or menstruation: ____________________.

Menarche is that the first menstrual cycle, or first menstrual bleeding, in female humans.
From both social and medical perspectives, it's often considered the central event of female puberty, because it signals the possibility of fertility.
When menarche occurs, it indicates that the girl has had a gradual estrogen-induced growth of the uterus, especially the endometrium, which the "outflow tract" from the uterus, through the cervix to the vagina, is open.
When a lady experiences menarche, the blood flow can vary from a slow and spotty discharge to a uniform blood flow for 3-7 days. While the colour of the blood does range from a brown to bright red color, this is often normal; some women have light periods while others have heavy ones; everyone is different.
In very rare instances, menarche may occur at a strangely early age, preceding the larche and other signs of puberty. This is often termed isolated premature menarche, but other causes of vaginal bleeding must be investigated and excluded.
Growth is typically normal. Isolated premature menarche is never the first manifestation of precocious puberty.
When menarche has did not occur for more than three years after thelarche, or beyond 16 years old , the delay is mentioned as primary amenorrhea.

To learn more about menarche: https://brainly.com/question/28239643

#SPJ4