subject: Pregnancy Calculator - Due Date Conception Calculator [print this page] Conception is the condition within the body when the man's sperm fertilizes a woman's egg. The sperm and egg join in the fallopian tube to form a zygote, which develops into an embryo and eventually, it would become a fetus. Only if the fertilization of the egg is followed by an implantation, pregnancy will take place. Approximately, 7-10 days the zygote becomes a blastocyst, which is a product of approximately 100 cells. The human blastocyst implants in the woman's uterus. The implanted blastocyst grows three germ layers. The inner layer is called mesoderm, the middle layer is the exoderm and the outermost layer is the endoderm. At this period of development the genetic father is completely involved into the formation of the embryo. Twin pregnancy is possible only till this stage in development.
Pregnancy Calculator - Due Date Conception Calculator
By: Lynn Shanon M Bailey
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