Efficacy of Bicarbonate on the Risk of Assisted Delivery in Nulliparous Women With Prolonged Labour

Inclusion Criteria

• •Age ≥18 years.
• •Danish or English speaking.
• •Cephalic presentation.
• •Gestational age ≥34+0 - \<42+0 (days +weeks) at onset of labour.
• •Normal foetal heart rate pattern in the 20 minutes prior to inclusion.
• •Spontaneous onset of labour or non-medical induced labour (balloon catheter and/or artificial rupture of membranes).
• •Active first stage of labour confirmed, according to Danish national guidelines: Cervical dilatation at ≥4 - \<10 cm with regular painful contractions.
• •Prolonged labour diagnosed, according to Danish national guidelines: Cervical dilatation progresses at less than 2 cm over a 4-hour period.