College entrance examination students take birth control pills to avoid physiological period, so why can birth control pills delay menstruation? When does birth control pill have the most effect? For those couples who do not want children, do you know when to take birth control pill has the most effect?
1. Long term contraceptive: including synthetic progestin and long-term estrogen. After the drug enters the human body, it will be stored in the adipose tissue, and then released slowly to inhibit ovulation and have a long-term contraceptive effect. It is suitable for women who cannot place IUD and are unwilling to use other contraceptive methods. There are mainly compound long-acting levonorgestrel oral tablets. Generally after menstruation, take one tablet on the fifth day, and take another tablet after 20 days. It's not as efficient as the short pill. Some women will have leucorrhea, menstrual disorders, early pregnancy like reactions, sometimes bleeding, and difficult to control. Extremely individual people can also have allergic reactions.
2. Short acting contraceptive: mainly composed of progesterone and estrogen. It can inhibit ovulation, hinder the normal growth of endometrium, change the nature of cervical mucus and change the normal peristalsis of fallopian tube. For women without underlying disease or diabetes.
3. Emergency contraceptive: the main ingredient is progestin. The principle of action of the drug is basically the same as that of the short acting contraceptive. For women under 40. Mainly Yuting, nuoshuang, baoshiting and mifepristone tablets. Generally, take the first tablet within 72 hours after sex, and then take another tablet 12 hours later, the earlier you take it, the better the effect. Side effects are more obvious, often nausea, vomiting, headache, dizziness, fatigue, breast swelling, bleeding, menstrual delay and so on. Taking the emergency contraceptive pill is only a remedy, not as a routine contraceptive method, only occasionally used. This is because of its high dose and side effects. Generally speaking, experts believe that contraceptives should be taken at most once a month, preferably not more than three times a year. Contraceptives do great harm to the body, so it's better to use less contraceptives. If you can go to the hospital for examination and use a suitable contraceptive method, it will be better.
In theory, contraceptives do delay menstruation.
Angongprogesterone is medroxyprogesterone acetate, which is a powerful progesterone. Its main function is to promote the proliferation and secretion of endometrium, complete the preparation for pregnancy, and protect the fetal body. In addition, it can also increase the consistency of cervical mucus and inhibit ovulation. Menstruation comes because the endometrium loses the support of estrogen and progesterone and falls off. If we can supplement progesterone artificially before that, the endometrium will continue to thicken and grow firmly on the uterine wall, then we can postpone menstruation.
However, contraceptives have side effects. Some women may have short-term discomfort at the beginning of taking contraceptives, such as early pregnancy like reaction, manifested as dizziness, nausea, loss of appetite, etc. A few will also have allergic reactions, including pruritus, measles, angioneuroedema, etc.; breast distention, abdominal distention may also be possible. In addition, patients with thromboembolic diseases and severe liver dysfunction are forbidden to take this medicine.
In a word, although taking contraceptives can delay menstruation, it may also bring other physical discomfort and influence. In addition, everyone's physical condition is different. In order to reduce the risk, it should be used under the guidance of doctors.