text: Yes, a STD can stop you from getting pregnant thats why it is so important for sexually active women to get regular gynocological check ups because a woman could have an STD like chlamydia or gonnoreah and not even know it and this if left untreated will led to pelvic inflammatory disease which can cause women to become infertile. Therefore, when you visit your gynocologist not only do you need to ask for a pap smear but, you should let him/her know that you are sexually active and want to be tested for STDs there is nothin to be embaressed about when it comes to your health this should be a top priority and remember to always practice safe sex or better yet abstinence.