Fertilization: Sperm Penetrates Egg. It takes about 24 hours for a sperm cell to fertilize an egg. When the sperm penetrates the egg, the surface of the egg changes so that no other sperm can enter. At the moment of fertilization, the baby's genetic makeup is complete, including whether it's a boy or girl.
Implantation bleeding is an early sign of pregnancy and only experienced by 1/3 of women. Discover when and what to look for as a sign of implantation. Implantation bleeding is an early sign of pregnancy and only experienced by 1/3 of women.
Implantation Bleeding occurs around seven to 14 days past ovulation (DPO) when the fertilized egg is implanted in the lining of uterus wall. While itâs happening, a small part of uterine lining can be released or disturbed, resulting in bleeding. Implantation Bleeding or spotting is usually pink or dark brown in color.