Implantation will not exceed a few days at the latest

There is a certain time requirement for the implantation of sperm and egg. Once the implantation time is missed, the embryo will not implant successfully. In this case, if you want the fertilization to be successful, you have to hope for the next breeding to be successful. In fact, it is still possible to learn more relevant educational experience. After all, these are all things we must experience, and it is useless to just avoid them.

1 Sperm and egg combination

The combination of sperm and egg produces sperm-egg fusion. This whole process is the process of fertilization.

It takes about 24 hours for sperm and egg to combine. When a capacitated sperm enters the zona pellucida of a secondary coil oocyte, sperm-oocyte fusion begins. When the sex chromosomes of the egg pronucleus and sperm pronucleus combine together, it means that the sperm-egg fusion has taken place.

During the cleavage and blastocyst production period, the somatic cells of the sperm and egg undergo metabolic changes, and the trophoblast cells emerge from the protruding adhesions that are covered among the adjacent somatic cells. Since the cell surface can transmit environmental influences to the test tube embryo, the changes in the cell surface can be described by nutrient uptake, division, preparation for embryo implantation or mitosis.

Growth and development of sperm and egg combination and embryo implantation

After fertilization, the egg cell begins mitosis and moves toward the uterus while disintegrating. After 36 hours of sperm and egg combination in the bilateral fallopian tubes, they break down into two somatic cells, and after 72 hours they break down into 16 somatic cells, which are called morula. On the 4th day after fertilization, the cell mass enters the uterus and continues to grow in the uterus. At this time, the cell mass has broken down into 48 cells, becoming a blastocyst ready for implantation. The blastocyst can secrete a growth hormone that helps the blastocyst embed itself into the uterine wall. On the 6th to 7th day after fertilization, the blastocyst begins to implant. The embryo implantation site is mostly in the upper 1/3 of the uterus. Embryo implantation means that the test tube embryo has been placed and has begun to form an embryo and create a fetus.

2Generate

After sex, the semen that men ejaculate contains about 100-300 million sperms. This huge "team" flows back "joyfully" in the female reproductive system.

And up. Male sperm relies on its little tail to swing at a rate of 2-3mm per minute. After a long "journey" - inside the vagina, cervix, and uterine cavity, it arrives at the bilateral fallopian tubes, where sperm and eggs "gather". During the above process, sperm undergo great changes in quantity, shape, structure, and biochemistry. In the end, only dozens to 200 sperm can reach the destination. First, the radiate corona cells of the ovarian follicle disperse under the action of enzymes in the fallopian tube mucosa and sperm, and several sperms pass through the regenerated corona radiata by tail movement. The sperm acrosome releases hyaluronidase and collase, absorbs the zona pellucida of the egg cell's jugular vein, and penetrates the zona pellucida.

After the male sperm penetrates the zona pellucida, the male sperm head touches the surface of the egg, the sperm and egg cytoplasm at the point of contact split, and the male sperm head and body enter the egg.

The daughter cytoplasm combines with the egg cytoplasm, and this egg is called sperm-egg fusion. Although hundreds of sperm can penetrate the zona pellucida, usually only one sperm can enter the egg and fuse with it to form a sperm-egg combination. This ecological reaction that prevents multiple sperm from entering the egg is called the zona pellucida reaction.

After the male sperm enters the egg, the tail end recedes, the head becomes round and enlarged, and the male pronucleus is produced; after the egg undergoes the second mitosis, its somatic cells produce the female pronucleus. The male pronucleus comes into contact with the female pronucleus, the respective nuclear strands disappear and combine, and the two chromosomes mix and match in the subsequent stage decomposition, the pregnancy is declared complete, and the birth of a new life is declared to have begun. It takes about 24 hours for sperm and egg to combine.

Failure of insemination affects the development of an entire person. Once it fails, it is equivalent to the death of a person. Therefore, in order to make more insemination successful, a good body is very necessary. Therefore, we must pay attention to taking care of our bodies at ordinary times and make ourselves grow up healthier and stronger.