The relationship between hatching time and sex-ratio in chicks.
D000367:Age Factors; D000818:Animals; D002642:Chick Embryo / Q000254:growth & development; D002645:Chickens / Q000502:physiology*; D004531:Eggs; D005260:Female; D006824:Hybridization, Genetic; D007185:Incubators; D008297:Male; D012621:Seasons; D012744:Sex Ratio; D013997:Time Factors