Why girls get a bad stomach cramp when they got their period?

What is the main goal of recommended dietary allowances (rdas)? to inspect school cafeterias across the united states to regulate foods sold at supermarkets and farmers' markets to investigate claims of tainted food being served in restaurants to indicate daily nutrient requirements

Blank is a disease in which the body is unable to make eunough of the hormone insulin to breakdown sugar into energy

What are 6 levels of organization for anatomy and psychology