Where do stem cell come from?

Where do stem cell come from?
1. Stem cell can be isolated from a human  embryo in  early development These are obtained with the  consent of donor parents at in vtro clinic
2. Stem colts can be derived from total tissue obtained from torrmiated pregnancies with donor consent
3. A normal egg cell has the nucleus removed and the cell is fused with any other body cell These cell are not as versatile and healthy as form obtained in the two processes above