Short estrous cycles in New Zealand dairy cattle.
D000367:Age Factors; D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D004777:Environment; D004971:Estrus; D005260:Female; D005298:Fertility; D007315:Insemination, Artificial / Q000662:veterinary*; D008297:Male; D009520:New Zealand; D010298:Parity; D011247:Pregnancy