Keith L, Oleszczuk JJ (January 1999). "Iatrogenic multiple birth, multiple pregnancy and assisted reproductive technologies". International Journal of Gynaecology and Obstetrics. 64 (1): 11–25. doi:10.1016/S0020-7292(98)00230-6. PMID10190665. S2CID31814692.
Liao JB, Buhimschi CS, Norwitz ER (June 2005). "Normal labor: mechanism and duration". Obstetrics and Gynecology Clinics of North America. 32 (2): 145–64, vii. doi:10.1016/j.ogc.2005.01.001. PMID15899352.
Griggs KM, Hrelic DA, Williams N, McEwen-Campbell M, Cypher R (November 2020). "Preterm Labor and Birth: A Clinical Review". MCN: The American Journal of Maternal/Child Nursing. 45 (6): 328–337. doi:10.1097/NMC.0000000000000656. PMID33074911. S2CID224813648.
Coley SL, Aronson RE (September 2013). "Exploring Birth Outcome Disparities and the Impact of Prenatal Care Utilization Among North Carolina Teen Mothers". Women's Health Issues. 23 (5): e287 –e294. doi:10.1016/j.whi.2013.06.004. PMID23993476.
Gadson, Alexis; Akpovi, Eloho; Mehta, Pooja K. (2017-08-01). "Exploring the social determinants of racial/ethnic disparities in prenatal care utilization and maternal outcome". Seminars in Perinatology. 41 (5): 308–317. doi:10.1053/j.semperi.2017.04.008. ISSN0146-0005. PMID28625554.
Gadson A, Akpovi E, Mehta PK (August 2017). "Exploring the social determinants of racial/ethnic disparities in prenatal care utilization and maternal outcome". Seminars in Perinatology. 41 (5): 308–317. doi:10.1053/j.semperi.2017.04.008. PMID28625554.
Neill WT (1964-01-01). "Viviparity in Snakes: Some Ecological and Zoogeographical Considerations". The American Naturalist. 98 (898): 35–55. doi:10.1086/282299. ISSN0003-0147. S2CID85209921.
Thompson MB (December 2007). "Comparison of the respiratory transition at birth or hatching in viviparous and oviparous amniote vertebrates". Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology. 148 (4): 755–60. doi:10.1016/j.cbpa.2007.01.006. PMID17314056.
Cook DF, Voss SC, Dadour IR (November 2012). "The laying of live larvae by the blowfly Calliphora varifrons (Diptera: Calliphoridae)". Forensic Science International. 223 (1–3): 44–6. doi:10.1016/j.forsciint.2012.07.015. PMID22921421.
Keith L, Oleszczuk JJ (January 1999). "Iatrogenic multiple birth, multiple pregnancy and assisted reproductive technologies". International Journal of Gynaecology and Obstetrics. 64 (1): 11–25. doi:10.1016/S0020-7292(98)00230-6. PMID10190665. S2CID31814692.
Liao JB, Buhimschi CS, Norwitz ER (June 2005). "Normal labor: mechanism and duration". Obstetrics and Gynecology Clinics of North America. 32 (2): 145–64, vii. doi:10.1016/j.ogc.2005.01.001. PMID15899352.
Griggs KM, Hrelic DA, Williams N, McEwen-Campbell M, Cypher R (November 2020). "Preterm Labor and Birth: A Clinical Review". MCN: The American Journal of Maternal/Child Nursing. 45 (6): 328–337. doi:10.1097/NMC.0000000000000656. PMID33074911. S2CID224813648.
Coley SL, Aronson RE (September 2013). "Exploring Birth Outcome Disparities and the Impact of Prenatal Care Utilization Among North Carolina Teen Mothers". Women's Health Issues. 23 (5): e287 –e294. doi:10.1016/j.whi.2013.06.004. PMID23993476.
Gadson, Alexis; Akpovi, Eloho; Mehta, Pooja K. (2017-08-01). "Exploring the social determinants of racial/ethnic disparities in prenatal care utilization and maternal outcome". Seminars in Perinatology. 41 (5): 308–317. doi:10.1053/j.semperi.2017.04.008. ISSN0146-0005. PMID28625554.
Gadson A, Akpovi E, Mehta PK (August 2017). "Exploring the social determinants of racial/ethnic disparities in prenatal care utilization and maternal outcome". Seminars in Perinatology. 41 (5): 308–317. doi:10.1053/j.semperi.2017.04.008. PMID28625554.
Thompson MB (December 2007). "Comparison of the respiratory transition at birth or hatching in viviparous and oviparous amniote vertebrates". Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology. 148 (4): 755–60. doi:10.1016/j.cbpa.2007.01.006. PMID17314056.
Cook DF, Voss SC, Dadour IR (November 2012). "The laying of live larvae by the blowfly Calliphora varifrons (Diptera: Calliphoridae)". Forensic Science International. 223 (1–3): 44–6. doi:10.1016/j.forsciint.2012.07.015. PMID22921421.
Keith L, Oleszczuk JJ (January 1999). "Iatrogenic multiple birth, multiple pregnancy and assisted reproductive technologies". International Journal of Gynaecology and Obstetrics. 64 (1): 11–25. doi:10.1016/S0020-7292(98)00230-6. PMID10190665. S2CID31814692.
Griggs KM, Hrelic DA, Williams N, McEwen-Campbell M, Cypher R (November 2020). "Preterm Labor and Birth: A Clinical Review". MCN: The American Journal of Maternal/Child Nursing. 45 (6): 328–337. doi:10.1097/NMC.0000000000000656. PMID33074911. S2CID224813648.
Neill WT (1964-01-01). "Viviparity in Snakes: Some Ecological and Zoogeographical Considerations". The American Naturalist. 98 (898): 35–55. doi:10.1086/282299. ISSN0003-0147. S2CID85209921.
Gadson, Alexis; Akpovi, Eloho; Mehta, Pooja K. (2017-08-01). "Exploring the social determinants of racial/ethnic disparities in prenatal care utilization and maternal outcome". Seminars in Perinatology. 41 (5): 308–317. doi:10.1053/j.semperi.2017.04.008. ISSN0146-0005. PMID28625554.
Neill WT (1964-01-01). "Viviparity in Snakes: Some Ecological and Zoogeographical Considerations". The American Naturalist. 98 (898): 35–55. doi:10.1086/282299. ISSN0003-0147. S2CID85209921.