From Babygaga.com…

Sexually transmitted infections (STIs) pose a serious risk to the health of an expecting woman’s pregnancy, particularly if left untreated. Luckily, most STIs are caught at the first prenatal screening, as the doctor will test for a variety of sexually transmitted diseases, such as HIV, chlamydia, and syphilis, as many STIs go untreated if a woman isn’t showing symptoms. Your doctor may also recommend testing for gonorrhea or hepatitis C during if you have been promiscuous prior to or during pregnancy. If a woman is sexually active throughout her pregnancy, particularly if she has multiple partners, then she runs the risk of contracting an STI. The later the trimester, the more harmful an STI can be to the pregnancy.

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