Chapter 7 Scene 5 Pregnant with Liujia

On Friday night, 21 days had passed since the woman's last period, which indicated she hadn't been pregnant for the past two months.Simply put, the couple had serious concerns about their fertility.But later they heard the experience of some friends, and they also tried their best to ask for advice, and finally realized that a couple who did not take any contraceptive measures must wait for more than half a year without pregnancy before they need to receive treatment.So he is not so anxious now.With renewed confidence, the couple decided to regroup and continue to pin their hopes on "next month".Tonight, he had just finished having sex, and both of them fell into a deep sleep.The woman won't be going to the bathroom tonight, so her "reflux" is going to wet the sheets.

For the past two weeks, their sex lives have followed roughly the same routine they've established since they decided not to use contraception.That is, they usually have sex on Saturdays and Sundays, and occasionally, like this week, they come on Fridays as well.But this week is a little different than usual.Wednesday night, when the woman came back from her regular Wednesday meeting and went to bed, she kept touching the man's body to wake him up, and then touched his penis until it stood up .Then, she took the initiative to straddle the man and pushed the penis into the vagina with her hands.The inside of the woman's vagina is already very moist at this time, and the penis can easily slide in, and the whole process that follows is also arranged by the woman alone.Gradually, the man also felt excited.But because they don't often take the female-on-top sex position, the penis slips out of the vagina several times.The woman had to twist her body desperately, and finally let him ejaculate.Tonight they tried the female-on-top position again, but somehow it just didn't work.As a result, the usual face-to-face posture was restored.

While a woman is asleep, something changes in her body that will change her life forever.This morning, she ovulated, and the egg was about to move to the left fallopian tube to wait for fertilization.When the egg reaches the fertilization area, exactly 3 sperms also arrive at the same time.The sperm begin to burrow through the egg's skin.Two of the sperm collided because they both wanted to burrow into the same spot on the cuticle at the same time, so they were both delayed for a few seconds.It is the third sperm that goes first, jumping over the other sperm, and galloping bravely towards the egg.A few seconds later, by the time the other two sperm arrive, a barrier has formed on the surface of the egg, cutting off all access.The sperm that got in first successfully completed the fertilization task.Three months after the couple gave up birth control, she finally became pregnant.

In another 20 days, when menstruation does not come, the woman will go for a pregnancy test.Then, it will be another 250 days before she gives birth.We'll never know who the baby's father is, though.Because that Friday night, the sperm waiting in her fallopian tubes came from two men.Now, the long process of fertilization is entering its final phase, the final moments in the quest of males and females to reproduce.In the previous scenes, we have explained a lot, including the whole process of sperm being born from the testicles until it is ejaculated into the woman's vagina.We've also seen sperm struggle to swim out of the pool of semen, through the thin tubes in the mucus of the cervix, and finally to the resting area in the fallopian tubes to stand by.Now, the sperm will wait in this resting area for the moment of truth.

Sperm spend up to a day on standby in the fallopian tubes, where thousands of sperm stand by at the same time at a time.They swim in sequence, one after the other, and exit the fallopian tubes.The final destination of these sperm is the fertilization area, and if they can touch the egg there, fertilization can be completed.However, in most cases, the egg does not appear in the fertilization area, and the sperm just passes through here, heading for the ultimate death. After the sperm reaches the fertilization zone, it behaves differently.The sperm's tail begins to wriggle violently while twirling wildly in circles or figure-eights.At any given time, there will be some sperm in the fertilization zone, ranging from one or two to thousands, all waiting for the egg to come, and usually, the egg will not come.Not long after, the sperm freed from the fertilization area one by one.As soon as each sperm leaves, new sperm come to fill the gap in the rest area.After the sperm leaves the fertilization area, it continues to travel down the fallopian tubes, and finally it swims out of the fallopian tubes and enters the woman's abdominal cavity.

Next, let's look at eggs.Not far from the ends of the two fallopian tubes, there are two large planet-like objects hanging upside down next to the black hole (referring to the opening of the fallopian tubes), which are the ovaries.There are tiny weaving hairs in the fallopian tubes, which constantly encourage the flow of body fluids. After each egg is discharged from the ovary, it slowly drifts towards the black hole of the fallopian tubes along the flow of body fluids.The end of the fallopian tube is like a human hand with outstretched fingers, waiting for the egg to enter the tube.From the moment it enters the fallopian tube, the egg begins its five-day journey to the uterus.

A sperm cannot complete fertilization just by meeting an egg in the fertilization area, because when the egg reaches the fertilization area, there are three layers of defense substances outside its body, which are the fortresses that the sperm must break through before the egg is surrendered.The outermost layer, the accumulative layer, is made up of a pile of cells of an indeterminate shape, and this layer of material is brought from the ovary by the egg.A layer of defensive substance located below the accumulation is also thicker, and this smooth film is called the transparent layer.It is the outer skin of the egg itself.And the most fragile layer located below the transparent layer is called the vitelline membrane.

The sperm first uses its own head to cut into the egg cell which has several layers around it.If this is successful, it can reach the transparent layer below, at which point it will have some chemical glued next to its head, which is equivalent to its first medal for hitting base.Next, the sperm continues to drill into the egg with the sharp needle at the front of its head.Its tail now swung violently and propelled forward.If the sperm can penetrate the transparent layer first, it can pass through the lower layer of space to the yolk layer, and the egg will then hug the sperm tightly and welcome it in, swallowing it whole at the same time.As long as the egg welcomes a sperm, a certain chemical substance is released on its surface, and within a few seconds, it is impossible for other sperm to penetrate the egg's surface.For human sperm, there is no prize for second place.

After the sperm successfully enters the egg, it first takes off its own cell membrane, and then releases the DNA, which is also the most important part of heredity.The DNA of the sperm is then fused with the DNA of the egg.The DNA fusion of sperm and egg contains the same amount of genes from father and mother.A brand new human individual is about to be created, his or her personality will depend on this subtle mix of genes from both parents. Based on the previous scenes, we usually have a good idea who the mother of the child is.After all, the fetus has to grow in the mother's body for nine months.However, who is the father of the child?As mentioned earlier, the woman had obtained sperm from two men in the days before the day of ovulation.One is her husband and the other is her lover.To find out who the real father of the child is, we have to go back in time ten days.Now let's witness the sperm wars for ourselves.