Massive fetomaternal hemorrhage (FMH) is a rare complication in pregnancy that may cause hydrops or can even be life-threatening for the fetus. We report on the case of a 19-year-old gravida I, para 0, who presented to our clinic at 32 weeks of gestation due to decreased fetal movements. The initial fetal heart rate tracing at admission showed a sinusoidal pattern without decelerations. The ultrasound examination performed immediately described a normally developed fetus with normal amounts of amniotic fluid and without abnormities of the placental structure. Doppler sonography of the fetal middle cerebral artery gave rise to the strong suspicion of fetal anemia, so that a cordocentesis was prepared for potential intrauterine blood transfusion. Meanwhile, the rate of fetal hemoglobin (HbF) cells in the maternal blood was found to be markedly increased with 66 ‰. Correspondingly, cardiotocographic findings worsened with repeated decelerations, thus an immediate cesarean section was performed based on the suspected diagnosis of an acute FMH. A fetus weighing 1,860 g was delivered, who had severe anemia with hemoglobin level of 4.0 g/dl. After a direct blood transfusion, HbF levels normalized rapidly, the fetus stabilized, and a normal recovery has thus far been reported. The presented case demonstrates the successful and straightforward diagnosis, as well as the management of a case of severe FMH and illustrates the special value of Doppler sonography in this context.

Keywords:
Fetomaternal hemorrhage, Fetal anemia, Sinusoidal fetal heart rate pattern, Doppler sonography, Middle cerebral artery
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© 2006 S. Karger AG, Basel
2006
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