Pregnant can have sex?

After pregnancy, women in the first three months of early pregnancy and the last three months of the third trimester of pregnancy, this period of time is not recommended, because the early three months, if the same room, then stimulation may cause uterine contractions, causing bleeding, causing abortion symptoms. After three months and 28 weeks, if the same room, it is easy to cause uterine contractions, causing premature delivery, and even some will cause premature rupture of membranes, causing intrauterine infection. Therefore, three months early and three months late pregnancy is recommended not to cohabit. The second trimester is full three months, to 28 weeks before the appropriate sexual life can be, this time the fetus has been relatively stable. If the placenta position is normal, no other threatened abortion symptoms without other diseases, then there can be moderate cohabitation.