Please ask how many days of pregnancy can occur on the day of the last menstrual period with unprotected sex.

Patient's question:

What is the specific probability of pregnancy when having unprotected sex on the very day of your last menstrual period? Is there any authoritative data on this? Thank you

Doctor's answer:

??????Hello, the chances of pregnancy in such a situation are very low, but the safe period is not 100% safe. It is recommended to check blood HCG 10 days after sexual intercourse to confirm early pregnancy. This is currently the earliest and most accurate test method.