The egg and sperm race.
Pilcher
Helen
H
D000818:Animals; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000502:physiology*; D005260:Female; D005854:Germ Cells / Q000166:cytology* / Q000502:physiology*; D006801:Humans; D007246:Infertility / Q000628:therapy*; D008297:Male; D009865:Oocytes / Q000166:cytology / Q000502:physiology; D018456:Reproductive Medicine / Q000639:trends*; D027724:Reproductive Techniques, Assisted / Q000639:trends*; D013094:Spermatozoa / Q000166:cytology / Q000502:physiology