- Carvajal A, et al. 2015. Emergency contraceptive pill safety profile. Comparison of the results of a follow-up study to those coming from spontaneous reporting. Pharmacoepidemiology and Drug Safety, 24(1): 93–97.
- De Santis M, et al. 2005. Failure of the emergency contraceptive levonorgestrel and the risk of adverse effects in pregnancy and on fetal development: an observational cohort study. Fertility and Sterility, 84(2):296–299.
- Endler M, et al. 2022. Effect of levonorgestrel emergency contraception on implantation and fertility: A review. Contraception 109:8-18.
- Leelakanok N. & Methaneethorn J. 2020. A Systematic Review and Meta-analysis of the Adverse Effects of Levonorgestrel Emergency Oral Contraceptive. Clinical Drug Investigation, 40(5):395–420.
- Polakow-Farkash S et al. 2013. Levonorgestrel used for emergency contraception during lactation-A prospective observational cohort study on maternal and infant safety. J Matern Fetal Neonatal Med, 26:219-221.
- Shohel M, et al. 2014. A systematic review of effectiveness and safety of different regimens of levonorgestrel oral tablets for emergency contraception. BMC Women’s Health 14(54).
- Shurie S, et al. 2018. Levonorgestrel only emergency contraceptive use and risk of ectopic pregnancy in Eldoret Kenya: a case-control study. The Pan African Medical Journal, 31(214).
- Shaaban OM et al. 2019. Levonorgestrel emergency contraceptive pills use during breastfeeding; effect on infants’ health and development. J Matern Fetal Neonatal Med. 32:2524–2528.
- Zhang J, et al. 2015. Association between levonorgestrel emergency contraception and the risk of ectopic pregnancy: a multicenter case-control study. Sci Rep 5(8487).