Understanding the principles of contraception can achieve twice the result with half the effort. Detailed interpretation of ten contraceptive methods

The principle of contraception refers to using scientific methods to prevent and disrupt some aspects of the normal pregnancy process, avoiding pregnancy and childbirth. There are many contraceptive methods currently used, and according to the principles of contraception, they can be summarized as

1、 Methods for inhibiting ovarian ovulation. Short acting and long-term contraceptive pills, subcutaneous contraceptive pills, etc. that have the effect of inhibiting ovarian ovulation in women. The development and maturation of eggs are influenced by the hypothalamus and pituitary gland. This contraceptive pill can inhibit the function of the hypothalamus and pituitary gland, prevent the development of eggs, and achieve the goal of contraception. In addition, women can also inhibit ovarian ovulation during lactation, so contraception can also be used during lactation.

2、 Inhibit the normal development of sperm. The gossypol extracted from cotton can inhibit the normal development of sperm, and long-term use of gossypol can significantly reduce or completely disappear the number of sperm, achieving the goal of infertility. This male contraceptive has not yet been promoted for use. In recent years, some places have made certain progress in using physical methods (such as ultrasound, microwave, warm heat, etc.) to stimulate the testicles to inhibit their spermatogenic function.

3、 Prevent the binding of sperm to eggs. There are many types of contraception methods, which aim to prevent sperm and eggs from combining to achieve the goal of contraception. For example, condoms, vaginal diaphragms, etc. prevent sperm from entering the vagina, or prevent sperm from entering the uterine cavity when entering the vagina. External contraceptives have a strong spermicidal effect, and placing them in the vagina can kill sperm that have already entered the vagina, preventing sperm from entering the uterine cavity. Male and female sterilization surgery can prevent sperm discharge or prevent sperm from combining with eggs, and is a permanent contraceptive measure; During sexual intercourse, external ejaculation or vaginal urethral compression is used to discharge semen outside the vagina or retrograde ejaculate into one's bladder, preventing semen from entering the vagina.

4、 Prevent implantation of fallopian tubes. The uterus is the place where the fetus is conceived, which interferes with the internal environment of the uterus and is not conducive to the growth and development of fertilized eggs. Placing contraceptive rings and various visiting contraceptives in the uterus can alter the endometrium and prevent the implantation and development of fertilized eggs.

5、 Staggered ovulation period contraception. Staggered ovulation contraception refers to the use of methods such as menstrual cycle calculation, basal body temperature measurement, and cervical mucus observation during the safe period of contraception to master the female ovulation period, avoid sexual intercourse during ovulation, and miss the opportunity for sperm and egg to meet.