Patient's question:
NoDoctor's answer:
The survival time of the egg is approximately 24 hours. After sexual intercourse, semen remains in the vagina, which contains a large number of sperm. The survival time of sperm is about 72 hours. Active sperm travel through the uterus to the ampulla of the fallopian tube to meet and fertilize the egg. The fertilized egg is then transported to the uterine cavity via the fallopian tube, where it "roams" for 2 to 3 days to find a suitable landing spot before implantation.