title: Diagnosis of early pregnancy by ultrasound in Macaca fascicularis.
abstract: Real-time ultrasonography was used to detect early pregnancy in 32 longtailed macaques (Macaca fascicularis). In 92% of the successful conceptions, a correct diagnosis was made. The earliest sign of pregnancy was an intrauterine ringlike structure (11 days). A "line swelling" (14 days) preceded definite fetal echoes (21 days), and fetal heart motion (30 days) proved fetal viability. Ultrasound is a rapid, noninvasive, and relatively cost-effective method of diagnosing and monitoring early pregnancy in M. fascicularis.
authors.affiliation: Regional Primate Research Center, University of Washington, Seattle.
authors.forename: S H
authors.initials: SH
authors.lastname: Conrad
authors.forename: G P
authors.initials: GP
authors.lastname: Sackett
authors.forename: T M
authors.initials: TM
authors.lastname: Burbacher
mesh_terms: D000818:Animals; D005260:Female; D005318:Fetal Heart / Q000502:physiology; D005333:Fetus / Q000033:anatomy & histology; D008251:Macaca / Q000502:physiology*; D008252:Macaca fascicularis / Q000502:physiology*; D011247:Pregnancy; D011258:Pregnancy Tests / Q000662:veterinary*; D011270:Pregnancy, Animal; D014463:Ultrasonography / Q000662:veterinary*; D014599:Uterus / Q000033:anatomy & histology