Rehbinder C, Edqvist L E, Riesten-Arhed U, Nordkvist M
Acta Vet Scand. 1981;22(3-4):355-9. doi: 10.1186/BF03548660.
Peripheral blood plasma levels of progesterone were studied in pregnant and non-pregnant reindeer. Marked differences in progesterone levels were found between pregnant and non-pregnant animals indicating that the determination of progesterone could be used as a pregnancy diagnosis test in reindeer.