Holmer, H; Oyerinde, K; Meara, Jg; Gillies, R; Liljestrand, J; Hagander, L (2015-01-01). "The global met need for emergency obstetric care: a systematic review". BJOG: An International Journal of Obstetrics & Gynaecology. 122 (2): 183–189. doi:10.1111/1471-0528.13230. ISSN1471-0528. PMID25546039. S2CID25934089.
Frasure, Sarah Elisabeth (2016). "Emergency Delivery". In Tintinalli, Judith E.; Stapczynski, J. Stephan; Ma, O. John; Yealy, Donald M.; Meckler, Garth D.; Cline, David M. (eds.). Tintinalli's Emergency Medicine: A Comprehensive Study Guide (8 ed.). New York, NY: McGraw-Hill Education.
Cunningham, F. Gary (2018). "Normal Labor". Williams Obstetrics (25th ed.). McGraw Hill.
MacDorman, Marian F.; Matthews, T. J.; Declercq, Eugene (March 2014). "Trends in out-of-hospital births in the United States, 1990-2012". NCHS Data Brief (144): 1–8. ISSN1941-4927. PMID24594003.
Holmer, H; Oyerinde, K; Meara, Jg; Gillies, R; Liljestrand, J; Hagander, L (2015-01-01). "The global met need for emergency obstetric care: a systematic review". BJOG: An International Journal of Obstetrics & Gynaecology. 122 (2): 183–189. doi:10.1111/1471-0528.13230. ISSN1471-0528. PMID25546039. S2CID25934089.
Mouri, MIchelle; Hall, Heather; Rupp, Timothy J. (2022), "Threatened Abortion", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID28613498, retrieved 2022-09-14
Holmer, H; Oyerinde, K; Meara, Jg; Gillies, R; Liljestrand, J; Hagander, L (2015-01-01). "The global met need for emergency obstetric care: a systematic review". BJOG: An International Journal of Obstetrics & Gynaecology. 122 (2): 183–189. doi:10.1111/1471-0528.13230. ISSN1471-0528. PMID25546039. S2CID25934089.
MacDorman, Marian F.; Matthews, T. J.; Declercq, Eugene (March 2014). "Trends in out-of-hospital births in the United States, 1990-2012". NCHS Data Brief (144): 1–8. ISSN1941-4927. PMID24594003.
Holmer, H; Oyerinde, K; Meara, Jg; Gillies, R; Liljestrand, J; Hagander, L (2015-01-01). "The global met need for emergency obstetric care: a systematic review". BJOG: An International Journal of Obstetrics & Gynaecology. 122 (2): 183–189. doi:10.1111/1471-0528.13230. ISSN1471-0528. PMID25546039. S2CID25934089.