It takes about one day.
The process of creating an embryo can take around 24 to 48 hours. This includes the fertilization of the egg by the sperm, initial cell division, and the formation of the embryo.
59 hours
At this point, the chimpanzee embryo's cells are undergoing a process called differentiation. This is when cells start to specialize and take on specific functions, leading to the development of different types of cells and tissues in the embryo. This process is essential for the formation of various body structures and organs in the growing chimpanzee embryo.
About two or three days
The embryo attaches to the wall of the uterus at implantation - between 4 and 12 days after conception. See article at Link (below)
10 hours
A mother elephant is pregnant for 645 days, or 1.7 years.
It's a 2 step process : you take Mifepristone which kills the embryo. Then you take Misoprostol within 72 hours which causes you to bleed and cramp so the embryo comes out. 2 weeks later you see the doctor for the checkup to make sure everything is out.
2 years
About 30 days
19 to 20 days
They aren't extict. Birds are dinosaurs.