different contraceptive methods are used by breastfeeding mothers. to investigate the effects of progestogen - only contraceptives on human milk components, a non-randomized, follow-up study was carried out in iran (varamin) on 140 breastfeeding women, 51 of whom used progestogenonly contraception including progestogen-only pills (pop) or depo-medroxyprogesterone acetate (dmpa), and 89 used non...