The word orgasm originates from the Greek language. It means that there is swelling.
In a woman, an orgasm is preceded by enlargement of the clitoris and wettening of the vaginal walls. The pelvic muscles, vagina, and uterus have rhythmic contractions.
Studies have shown that having an orgasm during pregnancy has no adverse effect on the pregnancy and does not hurt the baby and it has not been shown to complicate a pregnancy.
In fact, one study showed that women who have orgasms during pregnancy may have easier labors. If it feels good to you, go ahead and enjoy it. Some women feel contractions when they have an orgasm, but those are different than the contractions of labor and disappear shortly after the orgasm.
Some women who have certain high-risk pregnancies may want to discuss with their doctor whether lovemaking is OK in pregnancy.
For example, if you are at high risk for preterm labor, your cervix is already opening up, or if you have other complications such as a placenta previa, you may want to discuss this with your doctor, just to make sure.