Progesterone to Enhance the Efficacy and Success of Expectantly Managed Preterm Severe/Superimposed Preeclampsia

Inclusion Criteria: * UMMC antepartum patients with preterm PE between 23 0/7ths and 34 0/7ths weeks gestation when initially evaluated * Willing and able to understand study procedures and to provide informed consent Exclusion Criteria: * \>33 weeks gestational age or \<23 weeks gestation * Maternal compromise requiring emergent delivery (ongoing placental abruption, DIC, pulmonary edema). * Fetal compromise requiring emergent delivery (fetal bradycardia, recurrent late fetal heart rate decelerations, minimal to absent fetal heart rate variability). * Parameters according to current practice guidelines that exclude a patient from expectant management include the following: * Preterm premature rupture of membranes (PPROM) \> 34 weeks gestation; * Platelet count \< 100,000/microliter (thrombocytopenia) with evidence of HELLP syndrome; * Persistently abnormal hepatic enzyme concentrations (twice or more upper normal values); * Severe fetal growth restriction (ultrasound-estimated fetal weight less than fifth percentile); * Severe Oligohydramnios (AFI \< 5cm) * Reversal of end diastolic flow(REDF) in umbilical artery Doppler testing; * Recurrent (\> 2 readings \> 30 minutes apart) severe hypertension despite antihypertensive therapy; * Eclampsia; * Pulmonary edema; * Abruption placentae; * Nonreassuring fetal status during daily testing (biophysical profile \<4/10 and/or recurrent variable or late decelerations); * IUFD