Before puberty, girls' nipples will protrude independently. From then on, the nipple and breast will protrude into a small hillock. As the breasts further enlarge, the nipples and nipples become raised and enlarged within the breast contour. When nipples reach the development stage, most people's nipples protrude. The nipples of single women and nulliparous women are relatively small. Only after pregnancy, the breasts and nipples are affected by the estrogen and oestrogen of the pregnant woman's body, the mammary gland heat bubbles and milk ducts multiply, and the nipples begin to expand and become more protruding, preparing for childbearing. A normal nipple is a small cylindrical fleshy spot with a hole, 1 cm in diameter, about 1.5-2 cm in height, and dark brown. The nipple, also called the teat, is the raised cylindrical part in the center of the breast of mammals, which is harder than the nipple and breast. Human female nipples are an important erogenous zone and have a breastfeeding function. The nipple is composed of an inseparable complex of smooth muscle and connective tissue. The smooth muscles are arranged in a circular or radial shape. When encountering sexual excitement or mechanical stimulation, the smooth muscles contract, causing the nipples to harden and protrude. Photos of normal nipples Normal nipples vary greatly from person to person. For adult women, the nipple is located in the center of the breast, is cylindrical, and has a diameter between 1 cm and 2 cm. A few people can reach more than 2.5 cm. The height-to-width ratio of the nipple is 2 to 3 centimeters. If there is a retracted nipple, the nipple height will be significantly reduced. The color of nipples varies a lot, some are light pink, some are dark brown, and some are wine red. The color of women's nipples will change during different menstrual periods. The surface skin of the nipple is uneven, because there are many nipple pores all over the surface of the nipple. A normal nipple is a small cylindrical fleshy spot with a hole, 1 cm in diameter, about 1.5 to 2 cm in height, and dark brown. Before puberty, girls' nipples will protrude independently. From then on, the nipple and breast will protrude into a small hillock. As the breasts further enlarge, the nipples and nipples become raised and enlarged within the breast contour. When nipples reach the development stage, most people's nipples protrude. The nipples of single women and nulliparous women are relatively small. Only after pregnancy, the breasts and nipples are affected by the estrogen and oestrogen of the pregnant woman's body, the mammary gland heat bubbles and milk ducts multiply, and the nipples begin to expand and become more protruding, preparing for childbearing. |
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