Women can gradually recover their widened hip bones with reasonable rehabilitation exercises within six weeks to six months after delivery. However, if the optimal recovery time is missed, the speed and effect of recovery may not be as satisfactory. During pregnancy, the placenta secretes relaxin, which causes the pelvic ligaments to relax, thus causing the pelvis to widen, visually reflecting a wider crotch and larger hips. It takes about six weeks for the body functions to recover after delivery, so six weeks after delivery, relevant examinations should be conducted, including gynecological examination, pelvic floor function and ultrasound of uterine adnexa, and the pelvic recovery should be evaluated according to the examination results. If the recovery is not good, you should do postpartum repair exercises, such as yoga and pelvic brace, from six weeks to six months after delivery to restore the pelvic function to the best condition. In addition, women who are worried about the widening of the crotch bone can consider repairing it after giving birth, but they must choose doctors and rehabilitators from professional medical institutions. Also pay attention to rest after giving birth, avoid heavy physical activities, and pay attention to diet and nutrition.