Table 1.

Schematic representation of the experimental design.

Control: In Vivo Fertilized Mouse Embryos Flushed from the Uterus after Natural Fertilization	In Vitro Fertilization (IVF) 5%: IVF Performed in Optimal Conditions (Potassium Simplex Optimized Medium-KSOM with Amino Acids and 5% Oxygen)	IVF 20%: IVF Performed in High Oxygen (KSOM with Amino Acids and 20% Oxygen)
2-cell: 24–28 h	2-cell: 38 h	2-cell: 38-h
4-cell: 36–40 h	4-cell: 48–50 h	4-cell: 48–50 h
Morula: 60–70 h	Morula: 75–85 h	Morula: 75–85 h
Blastocyst: 82–84 h	Blastocyst: 108–110 h	Blastocyst: 108–110 h