Some sexual behaviors that aren't safe for any pregnant woman: If you have oral sex, your partner should not blow air into your vagina. Blowing air can cause an. Jump to Can having sex trigger labor? - No, a baby isn't hurt when a pregnant woman and her partner make love. The amniotic sac and the strong muscles of the uterus protect the baby, and the thick mucus plug that seals the cervix helps guard against infection. During intercourse, the penis doesn't go beyond the vagina, so it won't reach the baby.I've had a low sex drive · Is oral sex safe when I'm.