2009
DOI: 10.1007/s11250-009-9464-y
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Abstract: The primary objectives of this study were to investigate incidence of abnormal ovarian cyclicity (AOC) and its type in dairy and beef cows with prolonged postpartum period (>90 days) and in heifers that fail to conceive. A total of 53 animals were included in the study: 17 Friesian crosses, 16 Braford crosses, eight Brangus crosses, and 12 local Kedah-Kelantan (KKX) crosses. These animals were initially checked for absence of pregnancy via palpation per rectum. Blood samples for progesterone analysis were obta… Show more

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Cited by 6 publications
(1 citation statement)
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“…In both dairy and beef cows, reduced fertility is due to a high incidence of abnormal ovarian activity (Macmillan et al 2003;Yimer et al 2010). In previous studies, we demonstrated that the oocytes of 4-to 8-year-old dairy cows that had ovaries with fewer than 10 mid-antral follicles (2-6 mm in diameter) and no follicles $10 mm in diameter ('Lo' ovaries) exhibited reduced developmental capability compared with age-matched controls in which both ovaries had .10 mid-antral follicles ('Hi' ovaries; Modina et al 2007).…”
Section: Introductionmentioning
confidence: 99%
“…In both dairy and beef cows, reduced fertility is due to a high incidence of abnormal ovarian activity (Macmillan et al 2003;Yimer et al 2010). In previous studies, we demonstrated that the oocytes of 4-to 8-year-old dairy cows that had ovaries with fewer than 10 mid-antral follicles (2-6 mm in diameter) and no follicles $10 mm in diameter ('Lo' ovaries) exhibited reduced developmental capability compared with age-matched controls in which both ovaries had .10 mid-antral follicles ('Hi' ovaries; Modina et al 2007).…”
Section: Introductionmentioning
confidence: 99%