Bloomington, Ind.—They sell worldwide, often retailing for more than $2.50 per two-ounce bag: Lactation cookies, which manufacturers purport to increase milk in people who breastfeed. Many claim they ...

When 28-year-old Irene Wanjiru, was expecting her firstborn son, her mind was on having a safe delivery and a healthy baby. However, once her son was born, her joy soon turned into frustration as she ...