Post Date November, 16 2024
Everyone knows that abortion can cause great harm to women, but sometimes the emotions between men and women cannot be controlled. So, in order to achieve the beauty of both parties, it is necessary to learn contraception. Let's learn how to use contraception.
What is the principle of contraception?
Contraception is a method of preventing sperm from meeting eggs by Applied science principles, which makes women unable to conceive temporarily. Various contraceptive methods have advantages and disadvantages. Depending on the age, health status, number of children, lifestyle habits, and other factors of both men and women, different methods can be chosen according to individual needs. ① Contraceptive pills. ② Instrumental contraception. ③ Other methods: contraception during the Calendar-based contraceptive methods, Coitus interruptus, compression of the urethra, etc. The contraceptive effect is not ideal and is not suitable for popularization. Immune contraception, ultrasonic contraception, microwave contraception, and warm contraception are currently being studied.
If you want to know how to use contraception, you first need to know the four conditions required for pregnancy:
① Men can produce healthy and active sperm that can be excreted into the vagina of women.
② After entering the vagina, sperm can maintain mobility and pass through the cervix and uterine cavity to reach the fallopian tubes and combine with the egg.
③ The female can expel healthy eggs, which can enter the fallopian tubes and have the opportunity to meet sperm.
④ The Zygote must develop into an embryo in time to reach the uterine cavity, and the environment of the uterine cavity is suitable for the growth of the embryo. Artificially inhibit ovulation, prevent the combination of eggs and sperm, or make Zygote implanted in the uterus and grow, so as to achieve the purpose of contraception.
Common Contraceptive Methods
1. Wearing condoms: condoms are becoming thinner and thinner, with a high Factor of safety, and more and more unmarried cohabitants. Condom contraception is currently the most commonly used method, with the greatest advantage of not interfering with women's physiology, preventing sexually transmitted diseases, and being the biggest obstacle to consistent use. Regardless of improving the quality of the jacket, some people feel that this film affects their sexual preferences.
2. Extracorporeal ejaculation: The success rate of extracorporeal ejaculation contraception is less than 30%. Which man can control the explosion and escape of sperm? Almost none. Semen usually flows out a little from the urethral opening before ejaculation, containing about 50000 sperm per drop, which is enough to fertilize a female egg. In the most tense stage of sprinting, the timing may be missed too late due to the man's attachment pleasure, and you may not be able to feel the ejaculation. Therefore, it is not recommended to use this method.
