After the egg cell is released from the uterus and ovary, it enters the bilateral fallopian tubes within about 8 to 10 minutes. It passes through the fimbria of both fallopian tubes to the node of the fallopian tubes and the muscle wall, and stays in the ampulla. If it encounters male sperm, it will be fertilized and fused here to produce sperm-egg combination. The place where the human egg and male sperm fuse is mostly in the ampulla of the fallopian tube. Sperm in groups, during the movement, undergo the contraction of the fallopian tube muscles on both sides of the uterus, and finally only about 20 to 200 sperm reach the vicinity of the egg, and finally only one sperm and one egg cell fuse. Under normal circumstances, 8 to 10 days after sexual intercourse, a blood test to test human chorionic gonadotropin can be performed to determine whether the woman is pregnant. The sperm enters the woman's vagina, moves forward according to the shaking of the tail end to reach the cervical canal, and then moves to the ampulla of the fallopian tube. It takes about a day for sperm and egg to combine. After successful fertilization, it usually takes 3 to 4 days for sperm and egg to enter the uterus from both fallopian tubes and continue to develop in the uterus. At this time, the fertilized egg divides into 48 cells and becomes an egg ready for implantation. About 7 days after fertilization, the blastocyst begins to implant, mostly in the upper 1/3 of the uterus. Successful implantation means that the test tube embryo has been established and has begun to form a blastocyst, and pregnancy has begun. If you don't ejaculate sperm during sexual intercourse, you generally won't get pregnant. If you do get pregnant, it means that sperm has definitely entered your body. The primary conditions for pregnancy are: 1. Both parties have healthy fertility functions, healthy sperm and eggs, and have sex during the ovulation period. 2. If the fallopian tubes on both sides function normally, if the female ovulation function is abnormal or the male has low sperm density or abnormal sperm count, there will be no chance of pregnancy. If the male sperm is not ejaculated, the probability of pregnancy will be affected by many factors and there is no accurate probability. Before a man ejaculates, a small amount of semen may be metabolized, and a small amount of male sperm may appear in the semen. If it coincides with the ovulation period, the reproductive functions of both parties are relatively strong and pregnancy is possible. In clinical medicine, this type of unwanted pregnancy is quite common. |
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