Results 11 to 20 of about 199 (135)
Abnormal position of lymph nodes in a freemartin sheep [PDF]
Veterinary Medicine: Research and Reports, 2012 Angela M Gonella-Diaza, Luz Zoraya Duarte, Sergio Dominguez, Pedro A SalazarClínica de Grandes Animales, Facultad de Medicina Veterinaria y de Zootecnia, Universidad Cooperativa de Colombia, Bucaramanga, Santander, ColombiaAbstract: In this ...
Salazar PA +3 more
doaj +2 more sources
THE INCIDENCE OF FREEMARTINISM IN SHEEP [PDF]
Reproduction, 1971 Summary. A survey of sex chimaerism in the lymphocytes of sheep twins of mixed sex was made to attempt to establish the frequency of freemartinism in sheep. The sex of the karyotype was used as a criterion. Two sets of animals with sex chimaerism were found among the 161 sets which were examined; the females were freemartins.
exaly +3 more sources
Early Diagnostics of Freemartinism in Polish Holstein-Friesian Female Calves [PDF]
Animals, 2019 Grzegorz Smołucha +2 more
exaly +2 more sources
Animal Genetics, Volume 54, Issue 5, Page 613-618, October 2023., 2023 Abstract In about 90% of multiple pregnancies in cattle, shared blood circulation between fetuses leads to genetic chimerism in peripheral blood and can reduce reproductive performance in heterosexual co‐twins. However, the early detection of heterosexual chimeras requires specialized tests. Here, we used low‐pass sequencing data with a median coverage
Dorothea Lindtke +3 more
wiley +1 more source
Degree of leukochimerism with calf age in Angus‐crossbred twin sets
Animal Genetics, Volume 54, Issue 5, Page 619-622, October 2023., 2023 Abstract Twinning in cattle is infrequent and usually undesired. It can result in an increased occurrence of abortion and dystocia, reduced calf survival and a high likelihood of freemartinism in mixed‐sex twins. Twin gestations are also commonly associated with the formation of placental vascular anastomoses (PVA) between twins. Through PVA they share
Heather L. Hunt, Brian W. Kirkpatrick
wiley +1 more source
Characterisation of eight cattle with Swyer syndrome by whole‐genome sequencing
Animal Genetics, Volume 54, Issue 2, Page 93-103, April 2023., 2023 Abstract Swyer syndrome is where an individual has the karyotype of a typical male yet is phenotypically a female. The lack of a (functional) SRY gene located on the Y‐chromosome is implicated in some cases of the Swyer syndrome, although many Swyer individuals with an apparently fully functional SRY gene have also been documented.
Donagh P. Berry +9 more
wiley +1 more source
Reproduction in Domestic Animals, Volume 58, Issue 4, Page 529-536, April 2023., 2023 Abstract The objectives of this study were to compare oestrous synchronization expression and conception rate following timed artificial insemination (TAI) with frozen–thawed X‐sexed or unsexed semen in dairy and beef cows. For this study, 227 cows (dairy, n = 130 and beef, n = 97) were assigned to a 9‐day Ovsynch + controlled intravaginal drug release
Thabang Luther Magopa +2 more
wiley +1 more source
Twin reduction in the late embryonic period prevents the condition of freemartin in dairy cattle
Reproduction in Domestic Animals, Volume 57, Issue 12, Page 1649-1651, December 2022., 2022 Abstract The condition of freemartinism occurs in the bovine heterosexual twin foetuses and refers to the resulting infertile female. Vascular anastomoses of the foetal membranes are the major reason of this anomaly. This study examines whether single born heifers following induced twin reduction at 28–34 days of pregnancy could develop normal ...
Irina Garcia‐Ispierto +2 more
wiley +1 more source
Veterinary Record Case Reports, Volume 10, Issue 2, June 2022., 2022 Abstract A 20‐month‐old Holstein heifer presented for evaluation of progressive hindlimb lameness that was localised to the left coxo‐femoral joint, with development of a fever, tachycardia and bruxism. Radiographs and ultrasound of the coxo‐femoral joint were relatively unremarkable. An echocardiogram showed a static left‐to‐right shunting ventricular
Rachael Ann H. Lyons +3 more
wiley +1 more source
The ambiguity of freemartinism diagnosis in cattle revealed by cytogenetic and molecular techniques
Czech Journal of Animal Science, 2004 Nineteen heifers and three male co-twins, originating from heterosexual twin pregnancies, were analysed with the use of cytogenetic and molecular techniques.
J. Nowacka +6 more
doaj +1 more source