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Ginekologia i Położnictwo medical project
ISSN 1896-3315 e-ISSN 1898-0759

Influence of oligohydramnion on vaginal birth



Introduction. Oligohydramnion is a common problem in obstetrics. It brings a risk for the delivery, since the protective value of the amniotic fluid for the fetus experiencing variable intrauterine pressures is reduced. The aim. The aim was to present complications and outcome of deliveries in the group of women with oligohydramnios (O). Materials and methods. 239 women with AFI<8 cm were divided into two groups: A-idiopathic O and B- O caused by PROM. The all group of women with O was also compared to a group of 65 women with normal AFI. Results. Compared to the control group, patients with O were younger (27,4 versus 29,6 year). All types of decelerations were more frequently observed in fetal heart rate pattern during delivery. The percentage of operative delivery (caesarean sections (27,2%, vs 15,4%), forceps (12,6% vs 6,6%) was higher, and there were more fetuses with cord entanglement (19,3% vs 7,7%). Decelerations were more frequent when a fetus’ weight was more than 3200g. There were no differences between the average newborns’ weight, newborns’ condition in Apgar score and the frequency in percentage of meconium stained fluid. Women with PROM more often presented symptoms of intrauterine infection and fetal tachycardia, the average time of pregnancy was shorter and a newborns’ weight lower. Conclusion. There were more decelerations in the fetal heart rate pattern during delivery in the group of women with O especially if a fetal weight was more than 3200g. The percentage of fetuses with cord entanglement was higher. Patients more often delivered by caesarean section or forceps, but the newborns’ condition was good.