<qa>  What is the suspected cause of PPH?Blood loss will be measured for all consenting women who deliver vaginally. If PPH occurs and uterine atony is the suspected cause, women will be randomized to receive either: a four 200 μg pills of misoprostol sublingually and an IV of saline resembling oxytocin or b four placebo tablets resembling misoprostol sublingually and 40 IU oxytocin by IV. This study seeks to answer the following questions: 