Schooley Elizabeth, Bilbrough Graham, and Glavan Tiffany. “Art of Measuring Progesterone: Understanding Immunoassays”. Clinical Theriogenology 11, no. 4 (December 1, 2019): 627-631. Accessed May 15, 2024. https://clinicaltheriogenology.net/index.php/CT/article/view/9464.