DETERMINATION OF FETAL NUMBERS IN ALPINE DOES BY REAL-TIME ULTRASONOGRAPHY

Pregnancy diagnosis was carried out in Alpine does using a real-time u ltrasound instrument equipped with a 5 MHz sector array probe. Eighty Alpine does were examined 5 and 7 wk after breeding. Does were restrai ned while standing, and the transducer probe was placed on the hairles s caudal ventral abdominal wall cranial to the udder. Non-pregnant doe s were readily and accurately recognized at 5 and 7 wk after breeding. Number of fetuses per doe at 5 wk of gestation was different (P < 0.0 2) from the number of kids born because of underprediction of the numb er of triplets (three vs. eight sets); at 7 wk of gestation it was sim ilar (P > 0.2) to the number born. Accuracy for determining singles, t wins, and triplets at 5 wk of gestation was 44, 73, and 67%, respectiv ely; at 7 wk of gestation it was 82, 89 and 100%, respectively. This a ccuracy is similar to that reported in ewes. It was concluded that rea l-time ultrasonography scanning by the transabdominal route is a relia ble method for early pregnancy diagnoses in goats. The technique also enables accurate separation of does carrying singles, twins, and tripl ets as early as 7 wk in gestation. Such information can be useful for improved nutritional management.