Patient's question:
Medical Description: The patient is a 20-year-old female. She had sexual intercourse during her safe period but was unsure if she could get pregnant. However, she did not take any contraceptive measures. According to her cycle, today should be her menstrual period. Has she not had her period because she is pregnant? She has taken many pregnancy tests, but why hasn't she had her period?History of Treatment and Effect: She has used early pregnancy tests but has not been pregnant.
Help Needed: She wants to ask what could be the reason for not having her period when it was expected.
Doctor's answer:
Now there are many software and charts for self-testing of safe periods. By selecting or entering the average menstrual cycle of the last three months and choosing the first day of the last menstrual period on the calendar, you can visually see the safe period and fertile period in the form of a calendar. So, is the self-test of safe period accurate? Generally, the self-test of safe period is not very accurate. This is because, although women's ovulation time is mostly in the middle of the menstrual period, factors such as external environment, temperature, emotions, and health status can make ovulation time earlier or later. Some women may also experience extra ovulation due to sexual stimulation. In this way, how to judge the safe period makes it impossible to accurately estimate the safe period, which can lead to failure in contraception if one relies solely on the safe period.