Dr. Seth Guller, trained as a biochemist, joined the Yale Fertility Center as Director of the Reproductive Endocrinology Laboratory in 2007. The function of this clinical laboratory is to provide rapid hormone analysis for patients as well as test results for research studies. Dr. Guller strives to implement new tests for the recently acquired Roche Cobas e411 analyzer to improve the quality of patient care. He has also directed a research laboratory for the last 21 years. Dr. Guller has published more than 75 peer-reviewed papers.