The anus, unlike the vagina, will not stretch during intercourse. Continue reading to know if anal sex is safe during pregnancy or not. If you have placenta previaa condition where the placenta is covering the cervix fully or partially, anal sex should be avoided as it may put pressure on the placenta. Similarly with oral sex, if the person performing the act has any anal sex with prego women or sores in his or her mouth it makes it easier to transmit or contract an STD since the protective barrier is broken. This is more anal sex with prego women with anal sex because the vaginal opening is so close to the anus. Anal sex increases the risks of contracting sexually transmitted diseases and can affect the pregnant Kathleen bradley naked and her baby.