Hanley M, Sayres L, Reiff ES, et al. Tocolysis: A review of the literature. Obstet Gynecol Surv. 2019;74(1):50-55. doi: 10.1097/OGX.0000000000000635.

Ding MX, Luo X, Zhang XM, et al. Progesterone and nifedipine for maintenance tocolysis after arrested preterm labor: A systematic review and meta-analysis of randomized controlled trial. Taiwan J Obstet Gynecol. 2016;55(3):399-404. doi: 10.1016/j.tjog.2015.07.005.

Van Vliet EO, Boormans EM, de Lange TS, et al. Preterm labor: current pharmacotherapy options for tocolysis. Expert Opin Pharmacother. 2014;15(6):787-97. doi: 10.1517/14656566.2014.889684.

Lu JF, Nightingale CH. Magnesium sulfate in eclampsia and pre-eclampsia: pharmacokinetic principles. Clin Pharmacokinet. 2000;38(4):305-14. doi: 10.2165/00003088-200038040-00002.

Mackeen AD, Seibel-Seamon J, Muhammad J, et al. Tocolytics for preterm premature rupture of membranes. Cochrane Database Syst Rev. 2014;(2):CD007062. doi: 10.1002/14651858.CD007062.pub3.

Hein HA. Indomethacin tocolysis. Am J Obstet Gynecol. 1998;178(1 Pt 1):198. doi: 10.1016/s0002-9378(98)70664-7.

Gyetvai K, Hannah ME, Hodnett ED, et al. Tocolytics for preterm labor: a systematic review. Obstet Gynecol. 1999;94(5 Pt 2):869-77. doi: 10.1016/s0029-7844(99)00329-4.

Parant O, Deudon R, Bennevent J, et al. Utilisation des inhibiteurs des canaux calciques (ICC) en tocolyse en France et à l'étranger [Use of calcium channel blockers (CCB) for tocolysis in France and abroad]. J Gynecol Obstet Biol Reprod (Paris). 2015;44(4):312-23. French. doi: 10.1016/j.jgyn.2014.12.016.

Ulmsten U, Andersson KE, Wingerup L. Treatment of premature labor with the calcium antagonist nifedipine. Arch Gynecol. 1980 Jan;229(1):1-5. doi: 10.1007/BF02109822.

Read MD, Wellby DE. The use of a calcium antagonist (nifedipine) to suppress preterm labour. Br J Obstet Gynaecol. 1986;93(9):933-7. doi: 10.1111/j.1471-0528.1986.tb08011.x.

Ferguson JE, Dyson DC, Schutz T, et al. A comparison of tocolysis with nifedipine or ritodrine: analysis of efficacy and maternal, fetal, and neonatal outcome. Am J Obstet Gynecol. 1990;163(1 Pt 1):105-11. doi: 10.1016/s0002-9378(11)90679-6.

Finnström O, Olausson PO, Sedin G, et al. The Swedish national prospective study on extremely low birthweight (ELBW) infants. Incidence, mortality, morbidity and survival in relation to level of care. Acta Paediatr. 1997 May;86(5):503-11. doi: 10.1111/j.1651-2227.1997.tb08921.x.

Papatsonis DN, Van Geijn HP, Adèr HJ, et al. Nifedipine and ritodrine in the management of preterm labor: a randomized multicenter trial. Obstet Gynecol. 1997;90(2):230-4. doi: 10.1016/S0029-7844(97)00182-8.

Meyer WR, Randall HW, Graves WL. Nifedipine versus ritodrine for suppressing preterm labor. J Reprod Med. 1990;35(6):649-53. PMID: 2359062.

Kupferminc M, Lessing JB, Yaron Y, et al. Nifedipine versus ritodrine for suppression of preterm labour. Br J Obstet Gynaecol. 1993;100(12):1090-4. doi: 10.1111/j.1471-0528.1993.tb15171.x.

Koks CA, Brölmann HA, de Kleine MJ, et al. A randomized comparison of nifedipine and ritodrine for suppression of preterm labor. Eur J Obstet Gynecol Reprod Biol. 1998;77(2):171-6. doi: 10.1016/s0301-2115(97)00255-8.

Weerakul W, Chittacharoen A, Suthutvoravut S. Nifedipine versus terbutaline in management of preterm labor. Int J Gynaecol Obstet. 2002;76(3):311-3. doi: 10.1016/s0020-7292(01)00547-1.

King JF, Flenady V, Papatsonis D, et al. Calcium channel blockers for inhibiting preterm labour; a systematic review of the evidence and a protocol for administration of nifedipine. Aust N Z J Obstet Gynaecol. 2003 Jun;43(3):192-8. doi: 10.1046/j.0004-8666.2003.00074.x.

Nassar AH, Aoun J, Usta IM. Calcium channel blockers for the management of preterm birth: a review. Am J Perinatol. 2011;28(1):57-66. doi: 10.1055/s-0030-1262512.

Davis WB, Wells SR, Kuller JA, et al. Analysis of the risks associated with calcium channel blockade: implications for the obstetrician-gynecologist. Obstet Gynecol Surv. 1997;52(3):198-201. doi: 10.1097/00006254-199703000-00023.

Flenady V, Wojcieszek AM, Papatsonis DN, et al. Calcium channel blockers for inhibiting preterm labour and birth. Cochrane Database Syst Rev. 2014;2014(6):CD002255. doi: 10.1002/14651858.CD002255.pub2.