Pregnant women wear underwear as long as you choose the right size, loose is better, wear inappropriate bad. After pregnancy due to the body’s estrogen, progesterone secretion increased significantly, coupled with the weight gain during pregnancy, the breast will continue to grow, so wear underwear can play a fixed and supportive role for the breast, but also to reduce breast sagging due to gravity. Wearing the right underwear can prevent the glands of the breasts from being pulled and compressed due to gravity, reduce the possibility of vascular distortion, help promote blood circulation in the breasts, and avoid post-partum obstruction of the mammary ducts resulting in mastitis, or even insufficient milk and other conditions. Choose the right underwear to wear during pregnancy, and take it off when you are resting at home or sleeping at night to give your breasts a chance to relax.