The Food and Drug Administration approved a new generic version of a pill used to terminate pregnancies, a decision that comes as the Department of Health and Human Services reviews the drug’s safety. The FDA authorized a generic form of mifepristone, a 200-milligram oral tablet, on Tuesday from Evita Solutions, according to a letter posted on the agency’s website. Medication abortion is the most common form of abortion in the U.S. and has faced heightened scrutiny from antiabortion groups and lawmakers who have sought to limit its use.