The process of sperm and egg meeting, and the pleasure and male response in marital life.

> 67. **How ​​do sperm and egg meet?**

>

After sexual intercourse, the amount of semen ejaculated into the vagina by the male varies, ranging from 2 to 3 milliliters to more.

> Then it's 5-6 ml. Each milliliter contains anywhere from 60 million to 100-200 million sperm.

A massive "army" marches deep into the female reproductive tract.

Within 2 hours in the vagina, 90% of sperm will die, and they generally survive for no more than 8 hours.

1-5% of sperm can reach the uterine cavity; most sperm that enter the uterus can survive for 6 months.

Sperm can survive in the fallopian tubes for 1 to 3 days after 24 hours.

>

For sperm and egg to "meet," it's not an easy thing; at least...

It needs to pass through four stages: through the vagina, through the cervix, inside the uterine cavity, and finally...

It enters the fallopian tube and "meets" the egg.

>

Whether it can enter the cervix is ​​a major hurdle, depending on the composition of the cervical mucus.

> Related. During ovulation, uterine mucus is abundant and thin, facilitating sperm passage; ...

> The number of white blood cells in cervical mucus decreases, thus reducing the chance of sperm being engulfed;

In addition, the cervical mucus becomes more alkaline at this time, and sperm prefer alkaline environments and dislike acidic environments.

It plays a role in protecting sperm. At other times, cervical mucus is less and thicker.

It is thick, contains few nutrients, and makes it difficult for sperm to pass through; it also contains a large amount of white matter.

> Cells that frequently engulf sperm. Moreover, cervical mucus also filters sperm.

> Because cervical mucus contains countless protein fibers, which seem to form

These barriers form a series of fences, and only the strongest and most powerful sperm can overcome them.

Those abnormal sperm or weak sperm cannot overcome the obstacle, therefore...

Sperm that pass through cervical mucus to enter the uterine cavity and fallopian tubes are the best of the best.

>

After sperm passes through the cervix and enters the uterine cavity, it continues to move with the help of the fluid within the uterine cavity.

Continuing forward, it travels from the uterus to the fallopian tubes, a distance of only a few centimeters.

For tiny sperm, it's no less than a marathon. Not only is the journey long, but...

And there are many obstacles. Part of it gets stuck again when passing through the narrow fallopian tubes. Finally...

Only about 15 to 20 sperm reach the ampulla of the fallopian tube. At this point, the sperm that have been waiting...

Here, the egg relies on its own estrogen to adhere to and attract sperm. The sperm then...

> Go, the head secretes hyaluronidase to dissolve the outer corona radiata membrane of the egg, its

The strongest among them will be chosen in the end. Once the sperm enters the egg, the egg...

The door was immediately closed to prevent any "third party" from entering, thus completing the fertilization process.

>

> 68. What are the feelings during married life?

>

After reaching orgasm during sexual intercourse, the man's seminal vesicles, prostate, vas deferens, and ejaculation...

The vas deferens and urethral muscles undergo rhythmic contractions, resulting in the ejection of semen.

> Out. The woman experiences a certain degree of sexual stimulation due to friction between her labia, clitoris, and vaginal opening.

After a period of intense stimulation, clitoral twitching and rhythmic contractions of the muscles in the vagina and perineum may also occur.

> Contraction. Regardless of gender, after reaching orgasm during sexual activity, not only are they emotionally aroused, but also...

And a pleasant and comfortable sensation arises, only when this sensation occurs can sexual satisfaction be achieved.

>

Pleasure refers to an actual sensation in the cerebral cortex during sexual climax. According to...

Animal experiments have shown that a "pleasure center" exists in the rat brain, when...

When stimulated with electrodes, the rat exhibited pleasurable excitement. Similarly, in humans...

There may also be a similar center somewhere in the brain that triggers sexual desire.

> The key area for orgasm. Whenever sexual stimulation accumulates to a level sufficient to induce ejaculation,

Sexual stimulation inevitably triggers the "pleasure center" in the brain, thus giving rise to pleasure.

> Life. Some believe that this kind of instantaneous pleasure requires, in addition to the presence of "pleasure"...

In addition to the central nervous system as a guarantee, rapid neural reflexes are also necessary to complete the process. In men...

The uterus contains ejaculatory ducts, one on each side, each only 2 centimeters long, opening into the urethra.

When semen is ejected during ejaculation, the small opening makes it appear very powerful, and

The opening is also a cluster of nerve plexuses; at the moment of ejaculation, the opening...

The nerve plexus can trigger a series of reflexes that produce pleasure.

>

Sexual pleasure symbolizes the end of a sexual encounter, but because the pleasure is experienced...

The experience may become a desire for sex in the future.

>

> 69. **What changes occur in men during married life?**

>

Like women, male sexual response also has four phases: excitement,...

> Quiet phase, climax phase, and resolution phase.

>

(1) Excitation phase: Blood flows into the cavernous tissue of the penis, causing the penis to become engorged and swollen.

Distension is a sign of sexual arousal. At this time, due to the continuous stimulation of the spermatic cord leading to the testicles, swelling occurs.

> Contraction can cause the testicles to rise and move closer to the body, resulting in increased muscle tension and strength throughout the body. Some

In men, during this stage, the nipples will naturally become erect, and the heartbeat and breathing will accelerate.

>

(2) Peak phase (also known as the sustained phase): The glans penis becomes significantly larger and darker in color.

The testicles retract, moving closer to the body, and their size can increase by up to 50%. (This is a common phenomenon in men.)

These glands can also secrete fluid that flows out of the urethra before ejaculation.

These changes are not superfluous; they help men ejaculate sperm more powerfully.

At this time, the man's penis will ejaculate into the woman's vagina, and the man's shoulders, chest, neck, back,

The skin on the forehead and other areas is red.

>

(3) Climax: Due to the erect penis inside the vagina, one or two...

With a series of strong contractions, semen was ejaculated from the male urethra into the depths of the female vagina.

The speed of intercourse varies, and this is related to age and the frequency of sexual intercourse.

In general, the semen ejaculated by a physically strong male penis produces a substance inside the female vagina.

The intense sensation of ejaculation and contraction is precisely what brings a woman who has already reached orgasm.

They are more stimulated and feel more sexually satisfied.

>

Sexual orgasm is a systemic response, involving respiration, heart rate, and blood pressure.

Significant changes were observed. Breathing speeds sometimes exceeded 40 breaths per minute, and heart rates could reach 180 beats per minute.

This time, blood pressure further increases, with systolic and diastolic pressure rising by 2.6–5.3 mmHg respectively.

> kPa. Patients with severe hypertension and severe coronary heart disease should not take this lightly and should practice moderation in sexual activity.

>

> (4) Resolution period (release period): After the orgasm of intercourse, sexual desire tends to subside.

The tense muscles, rapid pulse, and elevated blood pressure quickly returned to normal, and the skin...

The flush on the skin fades quickly, and sweating may occur on the chest and forehead. The penis becomes shorter and softer, and the vulva...

The scrotum descends, and the testicles also return to their original position. The penis cannot achieve an erection again for a period of time.

The length of this period varies from person to person and from time to time. Some people with good physical condition and strong libido...

For men with high libido, a few minutes after ejaculation, the vagina can still respond to stimulation from the woman.

The penis will immediately become erect again, and a second sexual intercourse can be successfully completed. This is also very normal.

>

Generally speaking, men are more likely to reach orgasm before women.

Sexual arousal is faster for men than for women; the penis can become erect within minutes. Skilled men...

Sexual intercourse only requires one thrust to insert an erect penis into a woman's vagina.

> Entering the intercourse stage. During intercourse, the male's sexual response can develop rapidly and quickly progress.

When a woman reaches orgasm, her penis will quickly ejaculate as the woman's stimulation changes.

After ejaculation, male sexual arousal also subsides rapidly, leaving him with limited sexual desire for the woman for a period of time.

> Loss of interest in sex. This is also a characteristic of male sex organs.