Twin pregnancy in the mare causes economic loss. Early transrectal ultrason
ographic detection of twins and manual crush of one embryonic vesicle is th
e method of choice for managing equine twins (90% success rate). Transcutan
eous and transvaginal ultrasound-guided twin reduction techniques are descr
ibed for twin pregnancies that advance beyond 25 days of gestation. Reporte
d success rates for the ultrasound-guided procedures are 50% and 20%, respe
ctively. (C) 2000 Elsevier Science B.V. All rights reserved.