It's not just you -- this is totally common! During the first trimester, your body is hard at work, which means you may feel exhausted, nauseous, and overwhelmed -- no wonder you're not in the mood. "Once you hit your second trimester, the nausea lifts and estrogen kicks in, which jump-starts your sex drive," says Lou Paget, author of Hot Mamas: The Ultimate Guide to Staying Sexy Throughout Your Pregnancy and the Months Beyond. She advises that even if you're not up for intercourse, you can easily stay connected with your spouse by cuddling and kissing.

A lot of men worry about this, but the answer is no. His penis won't traumatize the baby or cause your water to break. If you notice any bleeding after sex, talk to your physician -- increased blood supply in your cervix and amped-up circulation to the vaginal area during pregnancy can sometimes cause spotting. Call your doctor to rule out more serious causes of bleeding, such as placenta previa, placental abruption, or premature labor.

If you're having a low-risk pregnancy with no complications, you can have sex up until the day you deliver, says Sarah de la Torre, MD, an ob-gyn in Seattle. But there may be circumstances when you have to avoid intercourse. For instance, if you have placenta previa or a risk of preterm labor, you'll most likely be put on pelvic rest, which means no intercourse, orgasms, heavy exercise, or lifting. Even if you're having a normal pregnancy, you may just not be in the mood. If the extra weight on your belly is making intercourse uncomfortable, experiment with new positions or try other forms of stimulation instead. If you still don't feel like having sex, tell your husband you're just not up for it -- he should understand.

It's fine if you're having a low-risk pregnancy. In fact, many women find that oral stimulation is a pleasurable alternative if intercourse seems clumsy and uncomfortable. However, you should avoid it if your husband has an open cold sore. That could be a sign that he has a type of herpes virus that could potentially be transmitted to you -- and could cause birth defects in your unborn baby. This risk is low, but to be on the safe side, talk to your doctor if you're concerned.

Yes and no. If you're a few weeks away from your due date, sex won't do much to induce labor. On the other hand, having intercourse when you're overdue can speed things along because prostaglandins, hormone-like substances in semen, help soften and ripen your cervix to get it ready for delivery.

The hottest position for the third trimester is on top of your partner. That way, you can control the depth of penetration. Or, if you want to really spice things up, try reversing this position by facing away from him while he's sitting up and supporting your tummy. "That feels fantastic too," Paget says.

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