Tetraploidy and aneuploidy after observation of diploid fertilization in vitro.

S D Bender
A D Dorfmann
J D Schulman
M Bustillo


A case is described in which a tetraploid and aneuploid conceptus resulted from dipronuclear embryos from in vitro fertilization. This finding strongly suggests that, after a meiotic error in either the egg or sperm, polyploidy has occurred as the result of a postfertilization mitotic error.