###Human: Is there any change of pregnancy followed by oral sex? ###Assistant: Hello. If her cycles are regular, then you had sexual activity in a safe period, and there is no risk of pregnancy. No need to get worried. Also, the sexual activity you had does not result in pregnancy. So you can stay relaxed and there is no need to take any pills to avoid pregnancy. Use condoms during sex to remain safe, and emergency pills are alternative but should be used in accidental or emergencies only.