How long does it take for sperm to fertilize an egg?

Hello, sperm and egg typically fuse within approximately 24 hours after intercourse. Following ejaculation, sperm rapidly travel from the vagina through the cervix and uterus into the fallopian tubes—usually reaching the tubes within about one hour. If the fallopian tubes are patent, fertilization (i.e., union of sperm and egg) generally occurs within roughly 24 hours. If intercourse coincides with ovulation, a fertilized egg (zygote) typically forms within about one week. We hope this information is helpful to you. Wishing you good health and happiness!