Scientists & Staff | National Institute of Environmental Health Sciences Skip Navigation Scientists & Staff Close the left navigation Add Reproductive & Developmental Biology Laboratory Table of Contents Chief Deputy Chief Male Reproduction & RNA Biology Pharmacogenetics Group Placental Cell Biology Group Pregnancy & Female Reproduction Reproductive Developmental Biology Group Reproductive Medicine Group Chief Francesco J. Demayo, Ph.D. Chief, Reproductive & Developmental Biology Laboratory and Principal Investigator Tel 984-287-3987 [email protected] Deputy Chief Carmen J. Williams, M.D., Ph.D. Senior Investigator Tel 984-287-4313 [email protected] Male Reproduction & RNA Biology Marcos Morgan, Ph.D. Stadtman Investigator Tel 984-287-3337 [email protected] Marine Baptissart, Ph.D. Fellow Tel 984-287-4321 [email protected] Ankit Gupta, Ph.D. Fellow - Visiting Tel 984-287-3337 [email protected] Yin Li, Ph.D. Biologist Tel 984-287-4319 [email protected] Pharmacogenetics Group Masahiko Negishi, Ph.D. (Retired) Scientist Emeritus Tel 919-942-2918 [email protected] Myeongjin Yi, Ph.D. Contractor Tel 984-287-4308 [email protected] Placental Cell Biology Group Carlos M. Guardia, Ph.D. Stadtman Investigator Tel 984-287-3070 [email protected] Asmita Singh, Ph.D. Visiting Fellow Tel 984-287-4566 [email protected] Elizabeth P. Banks Biologist Tel 984-287-4297 [email protected] Ruchir C. Bobde, Ph.D. Visiting Fellow Tel 984-287-4660 [email protected] Carolina Marvaldi, Ph.D. Visiting Fellow Tel 984-287-4637 [email protected] Keyshla Y. Negron Rios Fellow - NIH OxCam Predoctoral Tel 984-287-4297 [email protected] Pregnancy & Female Reproduction Francesco J. Demayo, Ph.D. Chief, Reproductive & Developmental Biology Laboratory and Principal Investigator Tel 984-287-3987 [email protected] Yamato Hayashi, Ph.D. Fellow - Visiting Tel 984-287-4577 [email protected] Sylvia C. Hewitt Senior Biologist Tel 919-523-5133 [email protected] Ryan M. Marquardt, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-3985 [email protected] Madhumita Ray Biologist Tel 984-287-3983 [email protected] Myeongjin Yi, Ph.D. Contractor Tel 984-287-4308 [email protected] Reproductive Developmental Biology Group Hung Chang H. Yao, Ph.D. Senior Principal Investigator Tel 984-287-4004 [email protected] Kimberly M. Abt, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-3998 [email protected] Yu Ying Chen, Ph.D. Fellow - Visiting Postdoctoral Tel 984-287-3997 [email protected] Martin A. Estermann, Ph.D. Fellow - Visiting Postdoctoral Tel 984-287-3995 [email protected] Keiko Nakano Biologist Tel 984-287-4241 [email protected] Barbara C. Nicol, Ph.D. Staff Scientist Tel 984-287-4010 [email protected] Christina L. Wilkinson, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-4243 [email protected] Reproductive Medicine Group Carmen J. Williams, M.D., Ph.D. Senior Investigator Tel 984-287-4313 [email protected] Wendy N. Jefferson, Ph.D. Biologist Tel 984-287-4299 [email protected] Emily A. McGlade, Ph.D. Fellow - IRTA Postdoctoral Tel 984-287-4302 [email protected] Lenka Radonova Fellow - Visiting Tel 984-287-3515 [email protected] Virginia Savy, Ph.D. Fellow - Visiting Tel 984-287-3361 [email protected] Paula Stein, Ph.D. Biologist Tel 984-287-4298 [email protected] Back to Top Last Reviewed: April 02, 2026