Present addresses: D.G. Orellana, Urbanizacion Colinas De Santa Rosa, Carrera 11a con 13a, 11a-25, Barquisimeto-Venezuela; C.K. Ast, 527, Copperline Drive, Garner, North Carolina, 27529, USA.
Successful reduction of a monozygotic equine twin pregnancy via transabdominal ultrasound-guided cardiac puncture
Article first published online: 25 MAY 2011
© 2011 EVJ Ltd
Equine Veterinary Education
Volume 24, Issue 2, pages 55–59, February 2012
How to Cite
Sper, R. B., Whitacre, M. D., Bailey, C. S., Schramme, A. J., Orellana, D. G., Ast, C. K. and Vasgaard, J. M. (2012), Successful reduction of a monozygotic equine twin pregnancy via transabdominal ultrasound-guided cardiac puncture. Equine Veterinary Education, 24: 55–59. doi: 10.1111/j.2042-3292.2011.00254.x
- Issue published online: 4 JAN 2012
- Article first published online: 25 MAY 2011
In horses, twin pregnancy is pathological and represents a potentially life-threatening condition to the mare and foal. Twinning occurs in approximately 2% of pregnancies. Of these, the majority of cases are dizygotic twins, resulting from 2 ovulations and monozygotic twins are rare. A 12-year-old Quarter Horse mare was presented for breeding management with shipped cooled semen and embryo transfer. Seven days post ovulation, a single late morula/early blastocyst was recovered and transferred immediately to a recipient mare. Thirty-six days after transfer, transrectal ultrasound examination revealed the presence of 2 embryos. A transcutaneous reduction of one of the fetuses was performed successfully at 128 days of gestation. This report is the first to describe a successful reduction of monozygotic twins by transcutaneous ultrasound-guided cardiac puncture.