Why are women's genitals black?

Before sexual maturity and after menopause, the vulva is not black, but pink or dark red. only in sexual maturity, or pregnancy, external pigmentation will be more, dark brown or black. Women show changes in vulva color, mainly related to estrogen and progesterone levels in women. Young female ovarian function is not perfect, hormone levels are very low, and postmenopausal female ovarian function has shown a decline, hormone levels are also very low, so the external cause of local pigmentation is relatively light color. And female sexual maturity after ovarian function is normal, estrogen and progesterone levels are relatively high, especially after pregnancy hormone levels rise rapidly, so it will cause women to show vulva color deepening. And this stage of female nipple color will also deepen, areola deepening, increase.