Overview
The purpose of this study is to is to determine the clinical effectiveness of a single dose of intravenous (IV) medication for the prevention of labor arrest and cesarean delivery in primiparous women undergoing trial of labor.
Eligibility
Inclusion Criteria:
- Primiparous
- Viable single intrauterine pregnancy
-≥ 34 weeks of gestation
- Ruptured membranes
- Category I tracing at time of inclusion
- Active phase of labor (\>=6 cm of cervix dilation)
Exclusion Criteria:
- Category II or III tracing
- Allergy to the study medication (IV Diphenhydramine)


