When the egg is released from the ovary, it is picked up by the fimbriae of the fallopian tube and moves inside the fallopian tube. If it meets up in the fallopian tube with a viable sperm and becomes fertilized, it continues traveling dorn the fallopian tube.Fertilization usually happens within 12-24 hours after ovulation. After fertilization the fertilized egg starts traveling down the fallopian tube toward the uterus.
If fertilization does not happen within 12-24 hours after ovulation, the egg dies off.
Implantation, the attachement of the fertilized egg to the uterus, happens on average about 9 days after ovulation/fertilization (between 6 and 12 days) and is required for the fetus to continue to grow.
The blood pregnancy test becomes positive 3-4 days after implantation, and the urine pregnancy test takes several days more.