The formal medical term for an aunt is menstruation. The first period may be light or dark red or brown in color and there are individual variations.
Normal menstrual blood is dark brown when it first comes, and will turn dark red as it increases.
However, when a girl has her menarche, the ovarian function is not well developed, the hormone level in the body is unstable, and all the functions have not yet been developed, so the color of the menstrual period will vary, and it is usually dark red or light red, which is a normal phenomenon. The color of menstrual blood will vary, usually dark red or light red, which is normal. Dark brown menstrual blood may appear if you get cold during menstruation or after eating cold food.
There is no specific standard or limit for the color of menstruation at the time of menarche. After menarche, irregular menstruation may occur for a short period of time, and the menstrual cycle will gradually become more regular as you grow older. It is important to pay attention to menstrual hygiene, avoid getting cold, and not eat cold food.