Contact Information

Phone: 517-432-1385


Interdisciplinary Science and Technology Building
766 Service Road, Room 3009
Michigan State University
East Lansing, MI 48824


  • BS, Virginia Tech, 1992
  • MS, Ohio State University, 1995
  • PhD, Ohio State University, 1998
  • Postdoctoral Fellowship, University of Kansas Medical Center, 1999-2003

Research Program

  • Mechanisms of maternal immunological tolerance to the semi-allogeneic fetus.
  • Effects of maternal infection on pregnancy.
  • Immune tolerance to male and female reproductive organs.
  • Long-term effects of pregnancy on women’s health.
  • Roles of extracellular vesicles in reproduction.

Recent Publications

  • Warren BD, Ahn SH, Brittain SK, Nanjappa MK, Wang H, Wang J, Blanco G, Sanchez G, Fan Y, Petroff BK, Cooke PS, Petroff MG. Multiple Lesions Contribute to Infertility in Males Lacking Autoimmune Regulator. Am. J. Pathol. 2021: 191:1592-1609. doi: 10.1016/j.ajpath.2021.05.021.
  • Ahn SH, Nguyen SL, Kim TH, Jeong JW, Arora R, Lydon JP, Petroff MG. Nuclear Progesterone Receptor Expressed by the Cortical Thymic Epithelial Cells Dictates Thymus Involution in Murine Pregnancy. Front. Endocrinol. 2022; 13:846226. DOI: 10.3389/fendo.2022.846226
  • Petroff MG, Nguyen SL, Ahn SH. Fetal-Placental Antigens and the Maternal Immune System: Reproductive Immunology Comes of Age. Immunol. Rev. 2022; 308:25-39. doi: 10.1111/imr.13090.
  • Link to all publications:

Funding Sources

  • National Institute of Child Health and Development
  • Michigan State University
  • AgBioResearch

Teaching Interests

  • General Immunology
  • Reproductive Physiology
  • Cell Biology
  • Histology
  • Scientific Writing

Service and Other Activities

  • Chair, Gordon Research Conference on Mammalian Reproduction
  • Section Director, Frontiers in Reproduction, Marine Biological Laboratory
  • Chair, CVM Awards Committee
PubMed Research