A postpartum girdle, or corset, is a restrictive compression garment worn by a woman in the weeks or months after she has given birth to help her recover her pre-pregnancy shape. According to Everyday Health, it works by helping the skin’s connective fibers re-adhere to underlying tissues.
The Daily Mail explains that during pregnancy hormones such as estrogen, relaxin and progesterone loosen a woman's abdominal muscles and pelvic structures to accommodate her growing baby and prepare her body for childbirth. These hormones remain in a woman's system for approximately six months after she has given birth. Compression garments support the torso and draw in stretched muscles. They also reduce strain on the pelvis, buttocks and lower back.