Oral antihypertensive regimens (nifedipine retard, labetalol, and methyldopa) for management of severe hypertension in pregnancy: an open-label, randomised controlled trial.
Easterling T, Mundle S, Bracken H, Parvekar S, Mool S, Magee LA, von Dadelszen P, Shochet T, Winikoff B.
Lancet. 2019 Sep 21;394(10203):1011-1021. doi: 10.1016/S0140-6736(19)31282-6. Epub 2019 Aug 1.
PMID:31378394
ACOG Committee Opinion No. 767: Emergent Therapy for Acute-Onset, Severe Hypertension During Pregnancy and the Postpartum Period.