title: [Early ultrasonic diagnosis of twins after insemination and contralateral embryo transfer in cattle and the results of calving].
abstract: In order to test the efficacy of ultrasonic diagnosis of early twin pregnancy, 20 dairy cows were inseminated, and 4-8 days later a seven-day old embryo was additionally transferred into the uterine horn contralateral to the site of ovulation. Sixteen of 20 cows became pregnant (80%). In 7 of 16 animals a twin pregnancy resulted (44%). Out of eight single pregnancies five (62.5%) followed insemination, and three (37.5%) followed egg transfer. Sixteen pregnant animals were examined ultrasonically. In 7 cases it was possible to estimate a twin pregnancy on the 41st day. This diagnosis was verified on parturition. The ultrasonically diagnosed side of pregnant horn in the singles was correct in 7 of 8 cases, identified by the genetical different origin of the offspring from artificial insemination or egg transfer.
authors.affiliation: Bezirksinstitut für Veterinärwesen Chemnitz, Universität München.
authors.forename: S
authors.initials: S
authors.lastname: Bach
authors.forename: W
authors.initials: W
authors.lastname: Kähn
authors.forename: F
authors.initials: F
authors.lastname: Müller
authors.forename: J
authors.initials: J
authors.lastname: Schulz
authors.forename: S
authors.initials: S
authors.lastname: Geigenmüller
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D004624:Embryo Transfer / Q000662:veterinary*; D005260:Female; D007315:Insemination, Artificial / Q000662:veterinary*; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000662:veterinary*; D014427:Twins; D016216:Ultrasonography, Prenatal / Q000662:veterinary*; D014599:Uterus / Q000000981:diagnostic imaging
vernacular_title: Die frühe sonographische Feststellung von Zwillingen aus Insemination und kontralateralem Embryotransfer beim Rind und die Ergebnisse der Abkalbungen.