Economics of Twin Pregnancies in Dairy Cattle [PDF]
Animals, 2021 Twinning in Holstein dairy cows has increased over time concurrent with increased milk production. Twinning in dairy cattle is not desirable due to the negative effects on both cows that calve twins and calves born as twins that result in economic losses
Victor E. Cabrera, Paul M. Fricke
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XX/XY Chimerism in Internal Genitalia of a Virilized Heifer [PDF]
Animals, 2022 Five DSD heifers underwent genetic analysis in the present study. We cytogenetically analyzed in vitro cultured leukocytes and searched for SRY, AMELX/AMELY and ZFX/ZFY genes in leukocytes and hair follicles, finding that four of the studied heifers were
Izabela Szczerbal +7 more
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Sexing of Embryos at the Time of Twin Reduction: A Clinical Approach [PDF]
Animals, 2023 This study provides new unique information on bovine twin pairs during the late embryonic period (28–34 days of pregnancy) in relation to (1) a predictive ultrasound measurement that was differential for sexing heterosexual twins; (2) intrauterine ...
Fernando López-Gatius +1 more
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Clinical Cytogenetics of the Dog: A Review [PDF]
Animals, 2021 The dog is an important companion animal and has been recognized as a model in biomedical research. Its karyotype is characterized by a high chromosome number (2n = 78) and by the presence of one-arm autosomes, which are mostly small in size.
Izabela Szczerbal, Marek Switonski
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Cytogenetic Screening on Mediterranean Italian River Buffalo Males Intended for Reproduction and Females with Fertility Issues—A Pilot Study [PDF]
AnimalsIn Italy, karyotype analysis is routinely performed on all young males intended for reproduction to screen for chromosome abnormalities. This practice gained prominence following the identification of a complex chromosome abnormality in a well-known bull
Angela Perucatti +13 more
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Twin Pregnancies in Dairy Cattle: Incidence, Reproductive Performance, and Farm-Level Economic Impact in a Red Holstein Herd in Romania [PDF]
AnimalsThis study evaluated the biological and economic impact of twin calvings in a commercial dairy herd located in Harghita County, Romania. Data from 2019 to 2022 were analyzed retrospectively using production, reproductive, and veterinary records.
Daniel Berean +6 more
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XXX/XY chimerism with urogenital malformations in a Japanese black calf [PDF]
Irish Veterinary JournalBackground Sex chromosome abnormalities in cattle are rare, and manifestations of genital anomalies due to such abnormalities are even less frequently reported. Among these, XXX/XY chimerism is particularly uncommon. This report presents a Japanese black
Chihiro Kanno +6 more
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Confined Blood Chimerism in Monochorionic Dizygotic Twins Conceived Spontaneously [PDF]
American Journal of Perinatology Reports, 2013 Traditionally, monochorionicity has been regarded as synonymous with monozygosity. However, several recent cases of monochorionic dizygotic twins have shown that monochorionic twins can be dizygous.
Takashi Kanda +2 more
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Applying real-time quantitative PCR to diagnosis of freemartin in Holstein cattle by quantifying SRY gene: a comparison experiment [PDF]
PeerJ, 2018 Background Freemartinism generally occurs in female offspring of dizygotic twins in a mixed-sex pregnancy. Most bovine heterosexual twin females are freemartins. However, about 10% of bovine heterosexual twin females are fertile.
Qinghua Qiu +5 more
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INCIDENCE OF TWINNING AND FREEMARTINISM IN FRIESIAN CATTLE WITH HISTOPATHOLOGICAL STUDIES OF THE FREEMARTIN GENITALIA [PDF]
Assiut Veterinary Medical Journal, 1994 The data of 2971 calvings including 41 twin calving were studies for the incidence of twinning and freemartinism in Friesian dairy herds. The overall incidence of twinning was 1.38% with 0.76% homosexual and 0.64% heterosexual.
S.H. SHEHATA +2 more
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