15 weeks pregnant, coitus into a little deep, if the labor test is normal, no abdominal pain, vaginal bleeding, etc. is not too important. Pregnant women 15 weeks pregnant, at this time the fetus has been relatively stable, can be appropriate sexual life, but to ensure the health of the fetus, it is recommended that coitus when the action is gentle, to avoid the strength of the larger, inserted too deep sexual behavior. Due to the cervix elongation of pregnant women, the cervix will be relatively thin, if the insertion is too deep may stimulate the cervix, which may lead to miscarriage or other serious diseases, jeopardizing the safety of the fetus and the pregnant woman. After intercourse, you should pay attention to observe whether there is any abdominal pain and bleeding, if not, it is usually not a big problem. Usually, in the first and second trimesters of pregnancy, it is best not to have intercourse for the safety of the fetus and the pregnant woman. If you do have intercourse, you should pay attention to the appropriate strength and frequency, and adopt appropriate and safe sexual positions to avoid causing miscarriage or premature labor, which will jeopardize the health of the fetus and the pregnant woman.