How long does it take for sperm to fertilize the egg? Five steps to tell you

The amount of sperm discharged by a man at one time is at least 20 million/m1, and each ejaculation can discharge about 2-6 ml of semen. Generally, sperm will solidify in a short time after being ejaculated, and will liquefy on its own after about 30 minutes to an hour. Only after liquefaction will the sperm combine with the egg. So, how long does it take for the sperm to combine with the egg cell?

1. The fertilization process takes about 24 hours. The fertilization process begins when a capacitated sperm enters the zona pellucida of a secondary oocyte. When the chromosomes of the egg pronucleus and sperm pronucleus fuse together, it marks the completion of the fertilization process.

2. During cleavage and blastocyst formation , the cells of the fertilized egg undergo metabolic changes, and the trophoblast cells adhere to the inner surface of the ovum by protrusions that cover the neighboring cells. Because the cell surface can transmit environmental influences to the embryo, changes in the cell surface can be explained by nutrient uptake, differentiation, preparation for implantation, or mitosis.

3. The fertilized egg divides into 2 cells after 36 hours in the fallopian tube, and divides into 16 cells after 72 hours, which is called a morula.

4. On the fourth day after fertilization , the cell mass enters the uterine cavity and continues to develop in the uterine cavity. At this time, the cells have divided into 48 cells and become blastocysts ready for implantation. The blastocyst can secrete a hormone that helps the blastocyst embed itself into the endometrium.

5. On the 6th-7th day after fertilization , the blastocyst begins to implant. The implantation site is mostly in the upper 1/3 of the uterus. Complete implantation means that the embryo has been placed, the placenta has begun to form, and the fetus has begun to be nurtured.