The U.S. Department of Agriculture canceled a grant worth $600,000 for the study of menstrual cycles in transgender men, Secretary Brooke Rollins said Friday. The Southern University Agricultural & Mechanical College in Louisiana was the recipient of the grant, according to a database on USAspending.gov. "The first occurrence of menstruation occurs at approximately 12 years of age and ends with menopause at roughly 51 years of age," the grant description reads. "A woman will have a monthly menstrual cycle for about 40 years of her life, averaging to about 450 periods over the course of her lifetime."