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Study the rate of progress of labor among nulliparous women belonging to different body mass index groups, & observe how does this variation in maternal body mass index may affect the course of labor.
Full description
For nulliparous cases presenting to the labor ward, maternal height & weight will be collected at the time of admission to calculate the BMI (body mass index) & further classified according to WHO (World Health Organization) categories. Putting into consideration the physiological increase in BMI related to pregnancy, the overweight participants whose BMI (25-29.9) will be combined with the normal range BMI (18.5-24.9) category. Labor characteristics of these participants will be then compared with those of the underweight (BMI less than 18.5) & obese (BMI 30 or higher) participants.Females are assigned in one of 3 groups based on their BMI; Underweight group (BMI <18.5kg/m2), Control group whose BMI within normal range (18.5-29.9 kg/m2),& Obese group (BMI more than or equal 30kg/m2).
Labor management protocols are fixed. Data on labor progression are collected, including cervical dilatation, cervical effacement, head station & descent. The median duration of labor , estimated by rate of cervical dilatation in cm, will be used as a measurement of labor progression in each group.
A cesarean section for abnormal labor pattern will be documented as failure of progress.
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Inclusion criteria
Full term pregnancy, singleton, viable fetus, cephalic (vertex) presentation, occipito-anterior position.
Exclusion criteria
Induction of labor by oxytocin or prostaglandins. Conditions requiring urgent delivery eg antepartum haemorrhage, fetal distress, cord prolapse.
600 participants in 3 patient groups
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Data sourced from clinicaltrials.gov
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