@misc{indiciae439b8f87a4b9, title = {Preovulatory progesterone supplementation.}, author = {J H Check}, year = {1990}, doi = {10.1016/s0015-0282(16)53785-6}, url = {https://pubmed.ncbi.nlm.nih.gov/2397803/}, note = {Source identifier: 2397803} }