Because your body doesn't change that much in the first trimester, sex can pretty much continue as it has in the Posituon. Later, as the uterus grows, eex positions may become more difficult to perform. Sex expert Pepper Schwartz, PhD, offers these suggestions on the best sexual positions during pregnancy:. The spoon position can be very cozy and intimate. In this case you should lie on your side curled in a C, with your partner facing your back and curled around you.