The effects of placental location on fetal ultrasonographic parameters and course of labour in term primigravid low risk pregnancies
Turkiye Klinikleri Jinekoloji Obstetrik, cilt.22, sa.1, ss.15-20, 2012 (Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 22 Sayı: 1
- Basım Tarihi: 2012
- Dergi Adı: Turkiye Klinikleri Jinekoloji Obstetrik
- Derginin Tarandığı İndeksler: Scopus
- Sayfa Sayıları: ss.15-20
- Anahtar Kelimeler: Maternal-fetal relations, Placental circulation, Placentation, Prenatal, Ultrasonography, Uterine diseases
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Objective: We investigated the possible effects of placental location on various fetal intrauterine sonographic parameters and labour course in low risk term primigravid pregnancies. Material and Methods: Placental locations were determined via ultrasonography among 232 primigravid pregnant women between 38-41 weeks gestation hospitalized for labor and who had no medical risk factors. Placentas were grouped into two groups as lateralized and centralized placentas. Fetal biometric measurements were also obtained. Course of labor was followed for every patient until delivery. Statistical power analysis of the study was made based on a previous study conducted with an a:0.05 error margin and minimum 80% power for statistical significance. Results: Eighty-one percent of placentas were centrally and 19% were laterally located. Intrapartum fetal distress was seen in 19.5% of laterally and 10.2% of centrally located placentas. The mean birthweight was 2880 g and 3020 g for laterally and centrally located placentas respectively. Occiput posterior fetal presentation, prone to delivery complications, was mostly seen in anteriorly (39%) and left laterally (40%) located placentas although occiput anterior fetal presentation was the leading presentation type in all placental locations. Patients with left lateral placental location had higher caesarean rates than all other locations and 80% of the indications for sectio were fetal distress. Conclusion: Although laterally located placentas have a lower incidence in low risk pregnancies, some amount of intrapartum risks can be attributed to these lateralized placentas. The risk of intrapartum fetal distress is slightly increased in laterally located placentas and dysfunctional labor causing cephalopelvic disproportion and arrested labor risk is slightly increased in centrally located placentas. Further randomized controlled studies are needed to evaluate possible effects of placental localization on fetal biometric development and labour. Copyright © 2012 by Türkiye Klinikleri.