Why can I still get pregnant after taking birth control pills?

Many women take birth control pills to prevent pregnancy after having sex, mainly because they are afraid of having to have an abortion after becoming pregnant. However, in reality, there are many unexpected situations. Many women still conceive normally after taking the medicine. So what is the reason for this? Next, let me tell you the specific answer to this question in detail.

1. If you have had multiple unprotected sexual intercourse before taking emergency contraceptive pills, and the fertilized egg has successfully implanted in the uterus after the previous sexual intercourse, emergency contraceptive pills will no longer have a contraceptive effect. That is to say, taking emergency contraceptive pills when you are already pregnant will not terminate the pregnancy.

2. Emergency contraceptive pills can only be effective for unprotected sexual intercourse that has already occurred once. Women who have unprotected sexual intercourse again after taking the pills may still become pregnant. Therefore, you should not have unprotected sex after taking the medicine until your menstruation resumes.

3. The contraceptive effect is related to the length of time between sexual intercourse and the use of medication. The earlier the contraceptive pill is used after sexual intercourse, the better the effect. As the duration of taking the pill increases, the contraceptive failure rate tends to increase. Some women fail to use the drug according to the instructions in the drug instructions and take the drug for more than 72 hours.

4. Taking other medicines while taking emergency contraceptive pills. For example, during antibiotic treatment, contraceptives should not be used for contraception, because antibiotics can inhibit the reproduction of bacteria in the intestines, reduce the decomposition of hormone conjugates, and reduce enterohepatic circulation. Drugs such as penicillin and ampicillin can destroy normal bacteria in the intestines, reduce bacterial activity, and lead to lower concentrations of steroid hormones in the blood, which can lead to contraceptive failure.

It is obvious from the above article that there are many reasons why women can get pregnant while taking birth control pills. However, there is no need to worry too much about this, and you should not think that contraceptive drugs are ineffective, because generally speaking, as long as they are taken in the correct way, the chance of contraception can be 100%.