Is it okay to have sexual intercourse during pregnancy?

There is no evidence that sex causes miscarriage or premature labor in low-risk pregnancies.  You may be sexually active until labor starts unless your physician instructs you otherwise.  If your pregnancy is complicated, discuss this with your doctor.  Lubricants such as Astroglide or KY jelly are not harmful.  A small amount of spotting during the 24 hours after intercourse is common.