In vitro development rates of fresh and vitrified rabbit embryos previously cultured with 0 or 10−3 M melatonin.

a, b values with different letters in the same column are significantly different (P0.05).N: number of cultured embryos.* Calculated as a percentage of cultured embryos.CF: fresh embryos without melatonin, MF: fresh embryos treated with melatonin, CV: vitrified embryos without melatonin, and MV: vitrified embryos treated with melatonin.In vitro development rates of fresh and vitrified rabbit embryos previously cultured with 0 or 10−3 M melatonin.