In a statistical study, Above Rubies' Nancy Campbell noted that for every child a woman bears, her risk for ovarian cancer decreases by 10%. Research further reveals the safeguarding nature of pregnancy and lactation; whereas women today experience four hundred menstrual cycles in their child-bearing years---a contributing factor to the rise of Endometriosis and other reproductive-related problems---women who experienced around only 100 cycles about a century ago lived virtually free of the diseases now feared. Why? Because the God-given gifts of pregnancy and lactation naturally allow rest for the body in ways that intervening methods (such as birth control) in reality prevent.