Baillargeon JP, McClish DK, Essah PA, Nestler JE (jul 2005). „Association between the current use of low-dose oral contraceptives and cardiovascular arterial disease: a meta-analysis”. The Journal of Clinical Endocrinology and Metabolism. 90 (7): 3863—70. PMID15814774. doi:10.1210/jc.2004-1958.
Yoshida H, Sakamoto H, Leslie A, Takahashi O, Tsuboi S, Kitamura K (jun 2016). „Contraception in Japan: Current trends”. Contraception. 93 (6): 475—7. PMID26872717. doi:10.1016/j.contraception.2016.02.006.
Taylor T, Keyse L, Bryant A (2006). Contraception and Sexual Health, 2005/06(PDF). London: Office for National Statistics. ISBN978-1-85774-638-9. Архивирано из оригинала(PDF) 9. 1. 2007. г. British women aged 16–49: 24% currently use the pill (17% use Combined pill, 5% use Minipill, 2% don't know type)
Baillargeon JP, McClish DK, Essah PA, Nestler JE (jul 2005). „Association between the current use of low-dose oral contraceptives and cardiovascular arterial disease: a meta-analysis”. The Journal of Clinical Endocrinology and Metabolism. 90 (7): 3863—70. PMID15814774. doi:10.1210/jc.2004-1958.
Yoshida H, Sakamoto H, Leslie A, Takahashi O, Tsuboi S, Kitamura K (jun 2016). „Contraception in Japan: Current trends”. Contraception. 93 (6): 475—7. PMID26872717. doi:10.1016/j.contraception.2016.02.006.
Taylor T, Keyse L, Bryant A (2006). Contraception and Sexual Health, 2005/06(PDF). London: Office for National Statistics. ISBN978-1-85774-638-9. Архивирано из оригинала(PDF) 9. 1. 2007. г. British women aged 16–49: 24% currently use the pill (17% use Combined pill, 5% use Minipill, 2% don't know type)