Your pelvic floor is a hammock of muscles stretching from your pubic bone to your tailbone. These muscles support your bladder, uterus, and rectum. During pregnancy, they bear increasing load as your baby grows — by the third trimester, they are supporting several extra pounds of uterus, baby, placenta, and amniotic fluid.
This strain is why up to 50 percent of pregnant people experience some degree of urinary incontinence (leaking when coughing, sneezing, or laughing). Strengthening the pelvic floor during pregnancy reduces this risk and speeds postpartum recovery.
But strength is only half the story. Your pelvic floor also needs to be able to relax and stretch during delivery. The best pelvic floor exercise program trains both contraction and relaxation — control in both directions. Strong pelvic floor control also reduces your risk of perineal tearing during delivery.