Diploidy might be restored by the doubling of the chromosomes without cell division before meiosis begins or after meiosis is completed. This is referred to as an "endomitotic" cycle. This may also happen by the fusion of the first two blastomeres. Other species restore their ploidy by the fusion of the meiotic products. The chromosomes may not separate at one of the two anaphases (called "restitutional meiosis") or the nuclei produced may fuse or one of the polar bodies may fuse with the egg cell at some stage during its maturation.