The aging of gametes, heteroploidy, and embryonic death.
D000818:Animals; D002869:Chromosome Aberrations; D005260:Female; D005313:Fetal Death / Q000209:etiology*; D005854:Germ Cells / Q000502:physiology*; D008297:Male; D051379:Mice; D010063:Ovum / Q000502:physiology; D011247:Pregnancy; D013094:Spermatozoa / Q000502:physiology