Всемирная организация здравоохранения: Экстренная контрацепция. who.int/mediacentre/factsheets/fs244/ru.
220
Marco De Santis et al. Failure of the emergency contraceptive levonorgestrel and the risk of adverse effects in pregnancy and on fetal development: an observational cohort study. Fertil Steril 2005, PMID: 16084867.
