4h 22min, oct 9, 2002 y - Placenta stage
Description:
The placenta functions as a organ with two components: the fetal placenta which develops from the same blastocyst that forms the fetus, and the maternal placenta.these both give the organisim the nutrints it needsAdded to timeline:
Date:
4h 22min, oct 9, 2002 y
Now
~ 23 years ago