Can taking birth control pills after ovulation prevent pregnancy?

There are long-acting contraceptives, short-acting contraceptives, or emergency contraceptives. Generally speaking, long-acting contraceptives are less effective, while short-acting or emergency contraceptives have the best contraceptive effects. If you get pregnant unexpectedly during the ovulation period, you can achieve contraceptive effects by taking birth control pills. This method of contraception using birth control pills is not recommended. It is okay to take it occasionally, but if you take it frequently, it will cause great harm to your body.

Emergency contraception works by interfering with women's reproductive cycle, preventing or delaying ovulation, interfering with fertilization and preventing the implantation of the fertilized egg. It is generally effective if taken within 72 hours. However, it is not 100% effective. It is recommended to do an early pregnancy test to confirm pregnancy when menstruation is delayed by about 7-10 days. Emergency contraceptive pills are a method of contraception that is effective 72 hours after sexual intercourse. Because the side effects of emergency contraceptive pills are more than ten times greater than those of general contraceptive pills, it is generally recommended not to take them more than twice a month and no more than three times a year.

Contraceptive pills are only effective if taken within the prescribed time - within 72 hours after sex. In addition, you also mentioned that your menstruation is very irregular. If you have sex again after taking contraceptive pills, it is possible that the subsequent unsafe sex caused pregnancy. Instead of guessing here, you might as well buy a few test strips to check whether you are pregnant. If you are not pregnant, it means that the emergency contraceptive pills are effective. Then you should go to the hospital to check out your irregular menstruation. Irregular menstruation is not good for your health, and you have to worry about it every month.

Birth control pills have significant side effects. For example, some women may experience increased vaginal discharge after taking birth control pills, while others may experience breast pain after taking the pills. This medicine can easily cause vomiting and nausea within twelve hours of taking it. Moreover, vomiting can easily cause the effective ingredients of the contraceptive pill to be vomited out, so you have to take another pill at this time.