I had sex 28 days after the abortion.

Abortion refers to artificial abortion. Generally speaking, it is okay to have sex 28 days after an artificial abortion, but you still need to take contraceptive measures; but if you experience physical discomfort after sex, the situation is relatively serious. Since each woman's situation after sex is different, whether it is serious or not also varies, and it needs to be judged comprehensively based on their own situation. The specific situation analysis is as follows:

1. It is okay: 28 days after the abortion, if the woman has no abnormal symptoms and her uterus has recovered well, it is generally okay to have sex without abdominal pain, vaginal bleeding, etc. You can observe for the time being. However, some women have already recovered their ovulation function at this stage, so they also need to take effective contraceptive measures during sex.

2. Important: If a woman experiences symptoms of physical discomfort after having sex, such as lower abdominal pain, increased secretions, abnormal bleeding, etc., the situation is relatively serious and she needs to go to the hospital in time for treatment and receive targeted treatment after the cause is identified.

You can closely observe whether there are any abnormalities after sex. You need to pay more attention to personal hygiene and go to the hospital for relevant examinations as prescribed by the doctor to determine the recovery of the uterus. For women who do not want to have children, effective contraceptive measures should be taken during sex to reduce the chance of accidental pregnancy.