Are you a man with type 2 diabetes? Are you trying to improve your diabetes control?

Our goal is to better understand how diabetes, glycemic control, and fitness may affect reproductive health and epigenetic factors in sperm. We are especially interested in studying men before and after improvements in diabetes control and/or weight loss.

The study will involve:

  • Brief physical exam.
  • Blood test.
  • Sperm samples.
  • 2 or 3 visits to Joslin Diabetes Center over 3 months.
  • Weekly phone calls to review blood glucose levels.

If your diabetes is uncontrolled (A1c > 7.5%), you will receive oral diabetes medications, blood glucose test strips and meter, and nutrition advice at no cost for the study period.

*Parking vouchers and compensation are provided to all participants.*


Are you…

  • Male
  • Age 18-65 years

Do you have any of the following conditions?

  • Type 2 diabetes 
  • Pre-diabetes
  • Overweight (BMI >25)
  • A1c > 7.5%


Email: JEST [at]