When is the contraceptive pill effective? How many hours should I take the contraceptive pill after the event

Contraceptive pills are divided into short-term, long-term, and emergency contraceptives. Some are effective when taken urgently, while others require long-term periodic use to achieve contraceptive effects. It is necessary to choose the correct contraceptive time based on different types of drugs, and only use it reasonably. This can help women protect themselves and avoid the harm of accidental pregnancy to their bodies.

When is the contraceptive pill effective?

1. Short acting contraceptive pills: The main components of short acting contraceptive pills are progesterone and estrogen. Due to the low hormone content in short-term contraceptives, these three types of contraceptives have relatively small side effects. The efficacy release time of short acting contraceptive pills is short, and they need to be taken daily according to the cycle, that is, on the first day of menstruation or the first day after menstruation as the first day of the medication cycle, take one pill every day for 21 consecutive days, and then stop using it for 7 days before entering the next cycle. Generally, continuous use for 7 days can achieve better contraceptive effects.

2. Long acting contraceptive pills: The main components of long acting contraceptive pills are progesterone and long-acting estrogen. Compared with short-term contraceptives, the medication has significant side effects and it is not recommended to discontinue the medication at will. The medication method for long-acting contraceptive pills is Compound 18- Taking norethisterone as an example, take the first pill on the fifth day after menstruation, and then take the second pill every 20 days. Then, take the second pill once a month and take it once a week after the first oral dose.

3. Emergency birth control pills: The main ingredient of emergency birth control pills is highly effective progesterone, which has the greatest side effects but is not affected by menstruation. They can be taken within 72 hours after the event. The purpose of emergency contraception is to prevent the implantation of zygote by thickening the endometrium abnormally, so the earlier you take it, the better the contraceptive effect will be. However, it should be noted that emergency contraceptives have significant side effects and cannot be used as a daily contraceptive method, nor should they be taken frequently.

How many hours should I take the contraceptive pill after the event?

It is generally recommended to take contraceptive pills within 72 hours after sexual intercourse, preferably within 48 hours. The shorter the time taken, the better the effect.

Post pill contraception is an efficient progesterone that acts as a contraceptive by interfering with ovarian ovulation, fallopian tube, and endometrial function. The general contraceptive efficiency is around 80% -90%, which is not 100% safe and has a certain failure rate. After the event, contraceptive pills often cause menstrual disorders, sometimes manifested as early menstruation, and often manifested as delayed menstruation. For the latter with delayed menstruation, timely examination of blood and urine HCG is necessary to rule out the possibility of contraceptive failure.