Neonatal nucleated red blood cell counts in twins
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Hidemi Mori
Abstract
We counted nucleated red blood cells (NRBC) per 100 white blood cells (WBC) in the umbilical cord blood from 98 twins born to 49 women with uncomplicated twin pregnancies at ≥ 34 weeks of gestation to better characterize NRBC in twins. Twelve women with monochorionic (MC) placentas and 37 with dichorionic (DC) placentas gave birth at 36.7 ± .9 and 36.5 ± 2 weeks of gestation, respectively. All twins were born with an Apgar score of ≥ 7 at 1 min. Log10 (NRBC/100 BC) in 98 twins exhibited a nearly normal distribution, and was significantly associated with gestational age for both MC (r=−0.457, p = 0.025) and DC twins (r =−0.275, p = 0.018), and with birth weight for both MC (r=−0.682, p < 0.001) and DC twins (r=−0.336, p = 0.003). Log10 (NRBC/100 WBC) tended to be larger in smaller twins than in larger twins in the MC group, and significantly larger in smaller twins than in larger twins in the DC group (p < 0.05). Intertwin difference in Log10 (NRBC/100 WBC) was defined as the value of Log10 (NRBC/100 WBC) of the smaller twin minus Log10 (NRBC/100 WBC) of the larger twin, and became greater with increasing intertwin difference in birth weight (r = 0.411, p = 0.003). These findings suggest that neonatal NRBC reflected gestational age and birth weight in twins. This preliminary observation using a small number of twins suggests that the smaller twin may have experienced a relative lack of oxygen compared with the larger twin in utero.
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
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- WAPM-Newsletter No 1
Artikel in diesem Heft
- Malignant disease in pregnancy
- Repeated ultrasound guided fetal injections of corticosteroid alter nervous system maturation in the ovine fetus
- Incidence and birth weight characteristics of twins born to mothers aged 40 years or more compared with 35-39 years old mothers: a population study
- Lipopolysaccharide stimulation of 70 kilo Dalton heat shock protein messenger ribonucleic acid production in cultured human fetal membranes
- Effect of positive end expiratory pressure on functional residual capacity and compliance in surfactant-treated preterm infants
- Neonatal nucleated red blood cell counts in twins
- Normalisation of a severely abnormal ductus venosus Doppler flow velocity waveform in a growth-retarded fetus with absent end-diastolic flow in the umbilical artery and congenital anomalies
- Acute iliac vein thrombosis in pregnancy treated successfully by streptokinase lysis: a case report
- Liquid ventilation in an infant with persistent interstitial pulmonary emphysema
- Renal vein thrombosis in a newborn with prothrombotic genetic risk factors
- Fetal pulse oximetry allows safe continuation of labor in the presence of mild-moderate non reassuring CTG
- WAPM-Newsletter No 1
