The US Food and Drug Administration (FDA) has approved a combination oral contraceptive (OC) tablet called Natazia (Bayer HealthCare Pharmaceuticals).  It is a bit different from other OC preparations in that it contains 4 progestin/estrogen dosing combinations during each 28-day cycle (instead of being monophasic or triphasic), and it contains estradiol valerate (instead of ethinyl [...]