What is the in vitro ejaculation?
Endogenesis refers to a way that the penis is pulled out when ejaculation is about to occur during sexual life, causing semen to shoot outside the woman's body.This method may be able to prevent pregnancy, but it is also extremely harmful to the body.So, what is the specific essence of the body?
Experts introduced that external ejaculation is a reflex movement of sperm radiation when male animal actions.For humans, a series of reconciliation movements of each single -sided piece of germ tract in the body are radiating semen from the penis.
The in vitro ejaculation includes two -step spinal cord reflection, and the primary center is in the lumbosacral segment spinal cord.
The first step, the impulse of the sympathetic nerve caused the vasal pipe and the smooth smooth muscle contraction of the seminal vesicles, thereby transferring the semen in the vasal and seminal gland to the urethra;
Step 2, with the impulse of the genital nerve, the root of the penis sponge body is contracted, thereby radiating semen in the urethra.The excitement of the superior part of the brain also plays a role in the erectile center of the spinal cord and the in vitro ejaculation center.Normal human excitement stimulates from various sensory through the brain to affect spinal cord reflection.
The advantages and disadvantages of in vitro ejaculation
advantage
Many people like to use external ejaculation contraceptives because of taking contraceptives with great side effects, such as can cause depression, loss of sexual desire, weight gain, headache, etc.In vitro radio spermatogenesis, no cost, no need to use any tools or drugs, no side effects of the body, and will not affect the pleasure during sex.
shortcoming
Compared with the use of condoms, taking contraceptives, and using contraceptive rings, the success rate of in vitro radio essence contraceptives is low.Although the use of external ejaculation does not require any cost, due to the low success rate, users must bear greater risk of pregnancy.
If the partner is suffering or or the use of external ejaculation method does not prevent infection.Because the virus and bacteria are also transmitted to each other through body fluids and mucosa.
Sudden interruption of sexual intercourse when the man reaches the climax, it will cause frustration to the other party and dissatisfy the partner.Scientists Masters and Johnson believe that frequent use of external ejaculation can cause premature ejaculation or premature ejaculation.
In the process of sexual intercourse, the penis will have an erection due to sexual excitement. If the sexual intercourse is forcibly suspended at this time, the function of the ejaculation center of the central nervous and waist dice will occur. Over time, it will easily suffer from functional non -ejaculation.
Harm of in vitro ejaculation
Some young couples adopt contraceptive methods in vitro exclusion when they live in sex. This method looks simple and easy, but there are many harms.
It is easy to cause contraception failure
The in vitro exclusion refers to the moment when the sexual intercourse reaches the climax, and the moment of ejaculation is about to interrupt the sexual intercourse, so that the semen is arranged outside.What do this natural contraception often fail to achieve the purpose of contraception?There are three reasons for failure to fail:
胞 1 子 Sperm cells usually flow out of the urethral mouth with the shrinkage of the vollarization pipe before ejaculation, and each drop contains about 50,000 sperm. If it flows into the vagina, a drop of semen can fertilize women;
到 2 冲 At the most tense stage, the timing of pulling out the penis may be too late due to the pleasure of men's attachment, so that some semen ejaculates in the vagina;
体 3 时 Sometimes after ejaculating in vitro, men immediately stroke the woman's genitals to make her climax, or they can do a second sexual intercourse for a long time. In these two situations, both fingers and penis may bring the sperm again into the sperm again.vaginal.
It is easy to cause sexual weakness
During the whole process of sexual life, its sexual reactions are completed under the control of the cerebral cortex.
The psychological and physiological stimulus in sexual intercourse will cause a series of changes. High excitement will cause mental tension, accelerate heartbeat, and increase blood pressure.At the same time, the reproductive organs are erected as penile blood vessel congestion and muscle contraction.If you suddenly interrupt sexual intercourse when reaching the climax, it will inevitably have a adverse effect on sexual psychology. Over time, sexual weakness will occur, causing premature ejaculation and impotence.
It is easy to cause functional non -ejaculation
During the sexual intercourse, the penis erection is harder before ejaculation.If you forcibly interrupt sex at this time, in vitro exclusion will cause the function of the central nervous and lumbosacral ejaculation center.Over time, it is easy to be dysplained without ejaculation.
It is easy to cause discord between husband and wife
Normal and moderate and harmonious sexual life can enhance the feelings between husband and wife, and this seemingly unscientific contraceptive method such as in vitro exclusion often causes the gap between husband and wife.If the woman is pregnant, the man does not think that it is generated by semen into the vagina in advance, but mistakenly believes that the woman is not vast, which causes the corner; and forcibly interrupts the sexual life, the woman can not get sexual satisfaction, sexual psychology is suppressed, and sexual intercourse will be sexual intercourse.Renewal, a shadow on the relationship between the husband and wife.It can be seen that the in vitro exclusion is insufficient, and other contraceptive methods are used between husband and wife.
In vitro ejaculation contraceptive effect
Like many other contraceptive measures, the key to the success of in vitro radon is the correct way of use and persistence.After studying, some topic teams found that the failure rate of the in vitro radiation method was about 15%to 28%without paying attention to the correct use method.In contrast, the failure rate of taking contraceptives is about 2%to 8%, and the use of contraceptive rings is only about 0.8%of the failure rate, and the failure rate of using condoms is between 10%and 18%.Some people think that the effect of using the body's ejaculation method is similar to the use of condoms, but further research is needed in this regard.In the case of each sexual behavior of the husband and wife, the failure rate of in vitro ejaculation is 4%. Compared with the use of contraceptive measures for each sexual behavior, the failure rate of the contraceptive pill is 0.3%.The failure rate of using the contraceptive ring is 0.6%, and the failure rate of the use of condoms is 2%.
The main cause of failure in vitro radio essence is at the moment of ejaculation. If the man cannot pull out the penis in time, it will cause some semen to shoot in the vagina, which will cause the woman to become pregnant.Some people think that the failure of the in vitro radio ejaculation is due to the inadvertent sperm before the man ejaculation, and the vagina of the woman will cause pregnancy.Some research organizations have not found sperm that can cause pregnancy from the body fluid excreted before ejaculation.At present, most people think that the failure of the in vitro ejaculation method is that before ejaculation, a small amount of semen flowing out of the woman enters the woman's vagina.For the above reasons, some experts suggest that men should urinate before sexual intercourse to eliminate the sperm in the urethra. After ejaculation, clean the penis as soon as possible, and avoid contacting the woman's vulva with their hands.
(Editor in charge: Wang Shaohua)
