The pill and folate metabolism.
D000748:Anemia, Macrocytic / Q000139:chemically induced; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D005492:Folic Acid / Q000378:metabolism; D005494:Folic Acid Deficiency / Q000139:chemically induced*; D006801:Humans; D007408:Intestinal Absorption; D011247:Pregnancy; D011480:Protease Inhibitors
D003276:Contraceptives, Oral; D011480:Protease Inhibitors; D005492:Folic Acid