Wacharaporn SesbupphaSurachai ChantipEdward J. DickNatalia E. Schlabritz-LoutsevitchRodolfo Guardado-MendozaStephanie D. ButlerPatrice A. FrostGene B. HubbardMahidol UniversitySouthwest National Primate Research CenterUniversity of Texas Health Science Center at San Antonio2018-07-122018-07-122008-08-01Journal of Medical Primatology. Vol.37, No.4 (2008), 169-17216000684004725652-s2.0-48649109947https://repository.li.mahidol.ac.th/handle/20.500.14594/18713Backgrounds: Stillbirths in non-human primates are a major problem and represent failure of the maternal-fetal-placental unit to maintain normal relationships because of various endogenous, undetermined or environmental factors. Methods: Records of 236 stillborns and their dams in a Macaca fascicularis colony during a 7-year period were reviewed retrospectively. Results: The 7-year stillbirth incidence was 11.99% (236 stillbirths, 1967 live births). Most (61.02%, n = 144) were of undetermined etiology. Fetal causes included trauma (22.46%, n = 53), fetal pneumonia (0.85%, n = 2) and congenital anomalies (0.42%, n = 1). Maternal causes included dystocia (9.75%, n = 23) and uterine rupture (0.42%, n = 1). Forty-nine placentas were available for histologic evaluation; there was placentitis in five, necrosis in five and placental abruption in two. Most stillbirths occurred close to term. First stillbirths usually occurred in 8- to 12-year-old animals during the first six pregnancies. Conclusions: Most stillbirths were of undetermined etiology. Fetal trauma was the most common cause. © Journal compilation © 2008 Blackwell Munksgaard.Mahidol UniversityAgricultural and Biological SciencesVeterinaryArticleSCOPUS10.1111/j.1600-0684.2007.00275.x