I have 38 years of experience in the field of reproductive endocrinology, with specific knowledge of analytical endocrinology, biomarker research, and non-invasive sampling and testing. I have published on such topics as proximate determinants of human reproduction, gonadotropin physiology and analytical methods in endocrinology. I have testified on molecular details in stand-alone test kits, similarities in analytical approaches and comparability of materials used in different analytical tests.