The whole process of conception, from the combination of sperm and eggs into fertilized eggs, through a series of processes such as implantation development, to delivery, pregnancy experienced 10 months. The following is the whole process of pregnancy I have carefully prepared for you. I hope you will like it. Come and have a look.

The whole process of conception 1 the birth of life is the process of combining a man's sperm with a woman's egg.

An adult male can produce 70 million-1.500 million sperm every day. (Sperm under microscope)

A woman will ovulate about 400 eggs in her life, but no more than 500 eggs. The survival time is12-24 hours. The purple human egg in this color picture sits on a column. Two red crown cells are attached to the transparent ribbon. (Human eggs with crown cells)

Although a normal man ejaculates tens of millions or even as high as 200 million sperm at a time, most of these sperm lose their vitality and die in the acidic environment of female reproductive tract. But only one or two can get into the egg. Sperm has a long journey to swim.

Sperm can move at a speed of 28 mph during sperm injection. (Hundreds of millions of sperm rushed to the egg)

After the egg is discharged, it swims to the uterus through a narrow fallopian tube about 15 cm long, and the nutrient cells around it surround it like a string of beautiful light rings. Soon, it will meet the sperm and begin the fertilization process. (The egg waits for the final winner)

After a difficult journey, the sperm finally found the egg: the nutrient cells around the egg surrounded it like a beautiful light ring. (The last sprint of sperm)

The egg meets the sperm and begins to wait for fertilization. (sperm on the surface of an egg)

At the moment of the combination of sperm and eggs, new life is about to be born.

At this time, the head of the sperm has been drilled in, and we can still see its middle and tail. It is like a constantly rotating drill, driven by the tail flapping, trying to enter the egg. (the moment when sperm enters the egg)

After 6 days of cultivation, the human embryo is implanted into the uterus: the life cycle begins. The picture shows that a 6-day-old human embryo has been implanted into the endometrium, the inner surface of the uterus. (New Life: Human Embryo after Six Days of Cultivation)

Six weeks after fertilization, the human figure was faintly visible.

Fetus up to 1 1 week: After the fourth month of pregnancy, the fetus grows from 5cm to10cm.

You can already see the embryonic form of human beings.

At this time, the fetus has grown to four and a half months. He moves his arm and puts his finger to his lips, which can promote his response to sucking.

The newborn is born and begins the journey of life!

The whole process of conception 2 The process of combining sperm with eggs is called fertilization, which generally occurs at the junction of ampulla and isthmus of fallopian tube.

The fertilization process includes:

1, sperm penetrates the egg membrane: when 1 capacitated sperm enters 1 secondary oocyte zona pellucida, it marks the beginning of fertilization process; The acrosome reaction of sperm makes its cell membrane and egg membrane fuse.

2. Cortical reaction: There are some small granules containing enzymes in the cytoplasm below the egg membrane called cortical granules. Under the action of enzymes, cortical granules can change the surface structure of egg membrane and prevent other sperm from entering the egg membrane for fertilization.

3. Formation and convergence of female pronuclei and male pronuclei: It takes about 12 hours for two pronuclei to form. The two pronuclei meet in the center of the egg, the nucleoli of the nuclear membrane disappears, and the chromosomes are also matched and paired, forming 1 cell containing 46 chromosomes, that is, the fertilized egg.

The whole process of conception 3 The birth of a baby is a miracle of life. For this magical process, I believe that both the prospective mother and the mother are full of curiosity.

Let Gao half a meter introduce the "romantic history" of sperm and eggs. After the sperm enters the vagina, it will be partially killed by the acidic environment in the vagina. Immediately, some will be blocked by the cervix, and only a few will break into the cervix at a very fast speed.

After that, sperm will face a long journey from cervix to fallopian tube.

This is a distance that is tens of thousands of times longer than the sperm body. Not only the distance is long, but also white blood cells on the road will devour a lot of sperm.

Finally, the sperm finally reached its destination-the ampulla of fallopian tube, but at this time, the number of sperm has dropped sharply from the original 1 100 million army to 200 elite soldiers.

These 200 sperm can finally see the egg, but it is not so easy to get close to the egg.

The egg is surrounded by the zona pellucida, which is wrapped around the egg. Sperm must use lysozyme in their heads to dissolve the zona pellucida before entering the egg. However, the amount of enzyme contained in a sperm is far from enough, and many sperm need to cooperate with each other to open the gap with the attack. After Qi Xin worked together to dissolve the zona pellucida and form a channel, the warrior with the fastest reaction in sperm immediately took advantage of it. The first one got into the zona pellucida and got in close contact with the egg. The zona pellucida quickly secreted a substance to block the gap and close the door.

After that, the egg will reject all latecomers and release special enzymes to remove the remaining sperm.

Therefore, fertilization is a war involving hundreds of millions of sperm. After eighty-one difficult, only the best "elite" can "win the beauty back". After the sperm enters the egg, their nuclei will approach each other and fuse, eventually forming a fertilized egg.

From this moment on, the fertilization process is over and the pregnancy process begins.

The fertilized egg begins to divide for the first time after 30 hours of formation, which is called cleavage.

With the increasing number of cells, 72 hours after fertilization, spherical embryos with cell number of 12- 16 will be formed.

At this time, the embryo is like a small mulberry, so it has a lovely name called morula.

While the morula continues to divide, it moves towards the uterine cavity.

It develops into a blastocyst on the 4th day of fertilization. The blastocyst will slowly dissolve the endometrium, and like a seed, it will be deeply buried in the uterine wall. This process is called implantation.

Implantation began about 5~6 days after fertilization and was completed on the 1 1~ 12 days.

After implantation, through rich vascular connections, the embryo absorbs nutrition and continues to grow up, and the baby's life begins.

Fertilization is a one-in-a-billion competition, so every baby born is the winner of this competition. You are half a meter tall and look forward to the arrival of this champion.