Sexually transmitted diseases (STDs) can damage your uterus or Fallopian tubes, making it more difficult to get pregnant. If you get an STD while you're pregnant, it could affect your pregnancy. Having your partner use condoms is a good way to protect yourself against STDs, especially if you have more than one sexual partner.
STDs include gonorrhea, chlamydia, genital herpes, genital warts (condyloma), syphilis and HIV (the virus that causes AIDS). Use a condom before trying to get pregnant if you have a problem with infections or are exposed to infections frequently, even if you use other forms of birth control. If you get an infection, get it cleared up before you try to get pregnant.