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last day of menstrual cycle
this is the last day the lady has belead witch is sheding the iner lining of her uterus. -
Period: to
40 week fetal development
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ovulation
As the body prepares to release an egg, levels of estrogen are increased. As the estrogen increases, the lining of the uterus becomes thick Read more: Explain the Menstrual Cycle | eHow.com http://www.ehow.com/how-does_5215342_explain-menstrual-cycle.html#ixzz2SA5I0QRI -
fertilization
Fertilization is more a chain of events than a single, isolated phenomenon. Indeed, interruption of any step in the chain will almost certainly cause fertilization failure. The chain begins with a group of changes affecting the sperm, which prepares them for the task ahead.Successful fertilization requires not only that a sperm and egg fuse, but that not more than one sperm fuses with the egg. Fertilization by more than one sperm - polyspermy - almost inevitably leads to early embryonic deat -
beveloping baby
baby begins to produce a hormone that prevents the mother form menstruating -
implantation
"Implantation is the process that involves attachment of the embryo to the lining of the uterus. The embryo penetrates through and embeds into the endometrial lining