Patient's question:
I want to ask if it's true that sperm and egg first fuse, and it takes seven to ten days for implantation to occur. If I have intercourse before June 15th, is there no chance of pregnancy? If I have intercourse on the 18th and take a birth control pill on the 19th, and if it works, does that mean the birth control pill failed to prevent the sperm and egg from implanting, so I got pregnant? It's said that since the child can develop normally, taking a birth control pill on the 19th would be useless. If the birth control pill had some effect, it would never allow pregnancy, right?Doctor's answer:
On the 19th, taking emergency contraception pills can only have some breastfeeding effects starting from the intercourse on the 18th, and it cannot have any breastfeeding effects on the intercourse before the 15th. Taking emergency contraception pills within 72 hours after intercourse can have some breastfeeding effects, with an effectiveness of 99%. If pregnancy is discovered after taking emergency contraception pills, the impact on the fetus is either complete or none. If the fetus is currently developing normally, it can be considered that the emergency contraception pills have no impact on the fetus.