Fig.3From: Efficient administration of a combination of nifedipine and sildenafil citrate versus only nifedipine on clinical outcomes in women with threatened preterm labor: a systematic review and meta-analysisForest plot of the effect of Sildenafil citrate along with Nifedipine compared to Nifedipine alone on the delivery rate in the 24–72 h after admissionBack to article page