Segmented ejaculation method (sex knowledge adult novel)

During sexual intercourse, men first become erect through central excitement, which causes the corpus cavernosum of the penis to become engorged with blood.
When a certain level of stimulation is reached through friction, ejaculation is caused.
Ejaculation is a reflex process.
First, the testicular efferent ductules contract, followed by the epididymal head and body, and then the epididymal tail.
Sperm is driven into the ampulla of the vas deferens through the vas deferens, and finally emptied into the seminal vesicles of the prostate.
Drive sperm and seminal plasma into the urethra. As the bulbocavernosus and ischiocavernosus muscles contract,
At the same time, the closure of the bladder neck also prevents semen from retrogradely ejecting into the bladder, allowing semen to be ejected rhythmically from the urethra.
It is generally believed that the ejaculation process involves seven powerful, rhythmic contractions.
We can artificially divide the ejaculation process into two parts, the first three as one part,
This part of semen mainly comes from the prostate; the remaining few are a section, mainly from the seminal vesicles.
Generally speaking, the sperm in the first part has good density, activity rate, motility, and survival rate.
According to statistics, 89% of men have a higher sperm count in the first part than in the second part.
5% of the cases have the same two parts, and 6% have the second part larger than the first part.
The segmented ejaculation method has great clinical significance in the treatment of male infertility.
If the patient's sperm count and motility are low, or if the semen is too thick or the amount of semen is too large,
The segmented ejaculation method can be used during sexual intercourse during a woman's ovulation period.
When the first ejaculation is completed, immediately withdraw the penis from the vagina.
The rest of the semen is ejected outside, which can avoid diluting the semen with the secretion of the seminal vesicle.
This ensures that high-density, high-quality, and highly active sperm remain in the vagina, improving the ability to conceive.
In the practice of "artificial insemination" and "test tube baby", segmented ejaculation has also become a routine step.
After the first batch of semen is processed, highly motile sperm are selected and sent into the uterus or used for in vitro fertilization.
In clinical biochemical tests, 4-6 parts of semen can also be collected according to the order of ejaculation.
The first part mainly comes from prostatic fluid, which has the highest acidic phosphate activity; the last part is seminal vesicle fluid.
Contains the highest amount of prostaglandins and fructose. By measuring these special or substances, we can understand the function of the accessory glands.
This examination method can also be used to study the physiological activities during ejaculation.
Some people have neurological problems that disrupt the ejaculation process.
Sperm is not ejaculated mainly with prostatic fluid, but with seminal vesicle fluid.
Sperm activity is lower than normal. This can also be a cause of infertility.