Hyoscine Butylbromide Effect on Duration of Labor

Hyoscine Butylbromide Effect on Duration of Labor in Nulliparous Women: A Randomized, Double Blind, Controlled Trial

To evaluate the duration of labour (active phase of labour) in nulliparous women with gestations between 37 and 41 6/7 weeks when 20 mg of Hyoscine butylbromide was applied intravenously and compared with similar patients that received a placebo.

Inclusion Criteria:

• Low risk gestation between 37 and 41 6/7 weeks.
• Cephalic (vertex) presentation.
• Spontaneous labor in active phase (4 cms)

Exclusion Criteria:

• Premature rupture of membranes upon arrival at the Labor and Delivery Unit > 4 hours.
• Multiple order pregnancy.
• Stillbirth.
• Any fetal condition that could interfere in the mode of delivery (macrosomia, fetal growth restriction, oligohydramnios).