Pregnancy diagnosis in an orangutan using two prepared test kits

The Nonhuman Primate Pregnancy Test (NPPT) kit and the Gravindex Slide Test (GST) were compared for the diagnosis of pregnancy in an orangutan. The NPPT was found to consistently detect chorionic gonadotropin earlier and longer than the GST. During approximately the last trimester of pregnancy, both tests registered negative results. It was concluded that the NPPT is a simple, effective pregnancy test for breeding age orangutans.