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Early Hum Dev. 2014 Jan;90(1):51-4. doi: 10.1016/j.earlhumdev.2013.10.005. Epub 2013 Nov 12.

Effect of placenta previa on neonatal respiratory disorders and amniotic lamellar body counts at 36-38weeks of gestation.

Author information

  • 1Department of Obstetrics and Gynecology, Nagoya University School of Medicine, Nagoya, Japan. Electronic address: hiro-t@med.nagoya-u.ac.jp.
  • 2Department of Obstetrics and Gynecology, Nagoya University School of Medicine, Nagoya, Japan.
  • 3Department of Obstetrics and Gynecology, Nagoya University School of Medicine, Nagoya, Japan; Bell Research Center for Reproductive Health and Center, Nagoya, Japan.
  • 4Department of Obstetrics and Gynecology, Kasugai Municipal Hospital, Kasugai-shi, Aichi, Japan.
  • 5Department of Pediatrics, Nagoya University School of Medicine, Nagoya, Japan.



Pregnancies with placenta previa are significantly associated with preterm delivery and cesarean section. Therefore particular attention should be paid to the incidence of neonatal respiratory disorders in pregnancies with placenta previa.


The purpose of this study is to examine the relationship between placenta previa and neonatal respiratory disorders, including respiratory distress syndrome (RDS) and transient tachypnea of the newborn (TTN), and to evaluate the impact of placenta previa on the amniotic lamellar body count (LBC) values.


We analyzed the data from 186 registered elective cesarean cases without fetal or maternal complications at 36-38weeks of gestation. Amniotic fluid samples were analyzed immediately without centrifugation, and the LBC was measured using a platelet channel on the Sysmex XE-2100.


RDS was present in four neonates (2.2%) and TTN in 12 neonates (6.5%). The rate of TTN was significantly higher and the LBC values were significantly lower in the placenta previa group than in the control group (P=0.002 and P=0.024). The adjusted odds ratio for neonatal TTN was 7.20 (95% confidence interval: 6.58-7.88) among females with placenta previa. In placenta previa, warning bleeding was a significant factor protecting against neonatal respiratory disorders (P=0.046).


Placenta previa in itself is a risk factor for neonatal TTN. When an elective cesarean section is performed in cases with uncomplicated placenta previa, special care should be taken to monitor for neonatal TTN even at 36-38weeks of gestation.

© 2013.


Amniotic fluid; Lamellar body; Placenta previa; Respiratory distress syndrome; Transient tachypnea of the newborn

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