Trust Oral contraceptive tablets with Ferrous Fumarate belongs to the combined oral contraceptive group of hormonal contraceptives. Each active tablet contains the same dose of estrogen and progestin, specifically Ethinylestradiol (0.03mg) and Levonorgestrel (0.15mg). One tablet should be taken daily to get contraception for a month. Once you stop using it, you can get pregnant without delay.