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Fertilization and Embryo Development. Following ovulation, the egg is capable of fertilization for only 12 to 24 hours. Contact between the egg and sperm is random. Once the egg arrives at a specific portion of the tube, called the ampullar-isthmic junction, it rests for another thirty hours. Fertilization â sperm union with the egg â occurs in this portion of the tube. The fertilized egg then begins a rapid descent to the uterus.
It takes about 12 to 24 hours for ovulation to take place. Ovulation usually occurs in about 14 days after the beginning of ones menstrual cycle. The lifespan of this released egg after ovulation lasts for about a mere 12 to 24 hours.And the fertilization of this egg must happen within this time limit.ow long foes the released egg takes to fertilize? Once the matured egg has been released from the follicle chances of that egg being fertilized for up to 12 to 48 hours are high. Hence it is considered to be the most fertile period of the cycle. Then the growing follicle secrets a kind of hormone called Estrogen.