Conversation: The conversation between human and AI assistant.
[|Human|] My partner and I had unprotected sex for about 10 seconds, and she thought she was pregnant because she missed her period which was 3 days after having sex. Then the next day she took a test and got a positive test. Is that possible to be pregnant 4 days after sex?
[|AI|]  Hello,First, do not panic. As you might be aware that in a woman with a regular cycle day ten to twenty of the cycle is the most fertile period of the cycle. Ovulation or egg formation usually occurs fourteenth days before the expected date of menses. If you happen to have unprotected sexual activity in this period, then there is a chance to get pregnant. It is not the time duration for which you had unprotected sexual activity, but the timing of the cycle during which you had sexual activity decides about pregnancy. Usually, it is not possible to have ovulation hardly three days prior to the expected date of menses. Please confirm if you happened to have unprotected sexual activity in the fertile period of the cycle. Hope I have answered your query. Let me know if I can assist you further.