Components and functions of birth control pills

　　Ingredients of birth control pills : The main ingredients of all birth control pills are inseparable from two substances - estrogen and progesterone. Different types of contraceptive pills consist of adjusting the ingredients of the two drugs to form different types of contraceptive pills, including long-acting contraceptive pills, short-acting contraceptive pills, family visiting contraceptive pills, and emergency contraceptive pills.

　　Function: Estrogen, progesterone and androgens are collectively called sex hormones. Drugs containing these three types of substances are female When endocrine deficiency occurs, replacement therapy can be used to establish a normal menstrual cycle and ovulation. The most commonly used method is contraception. It achieves contraceptive effects by inhibiting ovulation by inhibiting the hypothalamic-pituitary-ovarian gonadal axis.

　　Why do contraceptive pills and ovulation-inducing drugs contain both sex hormones, but the former inhibits ovulation and the latter promotes ovulation? Because the regulation of sex hormones on the human body is biphasic. When sex hormone drugs are taken below a certain level, they have a promoting effect; if they are above a certain level, the effect is exactly the opposite and they play an inhibitory effect. This is the basic pharmacology of ovulation-inducing drugs and birth control pills. 》》》 Two major symptoms of premature ovarian failure