After ejaculation most of the semen will be ejaculated into the base of the vagina and the inlet of the uterus. After a few minutes the sperm will enter the cervical canal and will emerge in the fallopian tubes in about 30 minutes. Sperm can survive and remain viable in the female reproductive tract for about 2-3 days. The ability to fertilize an egg ejected from the ovary remains for about 12-24 hours, but the fertilization energy for the union of sperm and egg is 1-2 days. The egg is fertilized in the abdomen of the fallopian tube and then the fertilized egg moves slowly through the fallopian tube and after 3-4 days it will enter the uterine cavity. If you want to get pregnant after sex, it is recommended to prepare for pregnancy during the ovulation period. After finishing ejaculation, you should put a pillow under your buttocks so that your buttocks are elevated for half an hour, this situation will make it easy to conceive. Go to the hospital to check the HCG of blood about 14 days after sex to see if you are pregnant. So the sperm will reach the fallopian tube in about 30 minutes or so. The above content is for reference only. Please refer to the doctor’s interview for specific medication and treatment guidance.