Whats the difference between the types of hormones?
Methods containing higher levels of hormones are more effective but have more side-effects. Methods that contain estrogen have more serious side-effects and health hazards (such as heart attacks and strokes) than methods with only progestin. Estrogen-free contraceptives are less effective than combined hormonal contraceptives. Visit our hormonal contraceptive page for the chemical names of the different types of artificial hormones.