title: Determination of ovulation by ultrasound examination and its relation to the LH-peak in heifers.
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D004971:Estrus / Q000502:physiology*; D005260:Female; D007986:Luteinizing Hormone / Q000032:analysis*; D010061:Ovulation Detection / Q000662:veterinary; D014463:Ultrasonography / Q000662:veterinary*
chemical_list: D007986:Luteinizing Hormone