Yes, that is your body's response to the oxytocin that is being released during orgasm. There is no need to worry about sex putting you into labor prematurely unless of course you are already at risk of premature labor. The other issue is again assuring: intercourse and orgasm during late pregnancy actually reduces the risk of preterm delivery in low risk patients.
Is it safe to have sex during pregnancy?
In most cases - yes. Your doctor will advise you against it only if you have complications to deal with or if you have a history of complications in your previous pregnancy(s). Orgasms can trigger uterine contractions that can be bad news for women experiencing high risk pregnancies.
What about oral sex? Is that safe?
Oral sex is considered safe during pregnancy provided your partner avoids blowing air into your vagina - a practice that could allow an air bubble to find its way into your bloodstream and produce fatalistic results. Another point of apprehension is the hormonal changes of pregnancy can change the taste and odor of your vaginal secretions that your partner may find off-putting.
Is it normal to lose all interest in sex when you are pregnant?
Pregnancy may change your feelings about sex totally or it may have no effect on your sex life whatsoever. While some experience an improved sex life, for others sex totally fizzles out after becoming pregnant. For some women pregnancy symptoms put them off sex in the first trimester, only to have the interest revived in the second trimester, and the interest tapers off once again in the final trimester. Others have zero interest throughout the nine months and still others have a great time throughout the three trimesters. Blame it on the hormone estrogen! Some couples fear sex because of a bad history of miscarriage.
I experienced spotting after having sex one night. Does that mean that having sex can hurt my baby?
Try not to panic; the spotting could be coming from the cervical blood cells. Since it is difficult to differentiate between harmless bleeding and problematic spotting, some doctors will advise abstinence during the first trimester until your cervix becomes less prone to this type of bleeding. Of course once the bleeding has been confirmed to be not in any way harmful, then intercourse is harmless.