
Irregular menstrual cycle, had intercourse on the fourth day of contraceptive pill use, concerned about the risk of pregnancy.
My friend is a 28-year-old woman whose menstrual cycle has recently become irregular. To prevent pregnancy, she started taking birth control pills. On the fourth day of using the contraceptive pills, she had sexual intercourse with her partner and is now very concerned about the risk of pregnancy.

Irregular menstruation may be caused by stress, weight changes, hormonal imbalances, and other factors. Birth control pills are a type of highly effective progestin that may interfere with the normal menstrual cycle, leading to irregular, early, or delayed menstruation after use. Having unprotected sex on the fourth day after taking the pill may carry a risk of pregnancy.
If the next menstrual period is delayed by more than a week, consider taking a pregnancy test to confirm whether you are pregnant. If the test result is positive, consult a doctor as early as possible to understand the development of the embryo and decide whether to continue the pregnancy based on medical advice.
At the same time, maintaining a healthy lifestyle, including regular sleep patterns, a balanced diet, and appropriate exercise, can help improve irregular menstruation.