The effect of the presence of a boar on the attainment of puberty in gilts.
D000367:Age Factors; D000818:Animals; D004971:Estrus; D005260:Female; D008297:Male; D011247:Pregnancy; D012737:Sex Factors; D013245:Sterilization, Reproductive; D013552:Swine / Q000254:growth & development*; D014649:Vas Deferens / Q000601:surgery