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Human Reproduction, Vol. 14, No. 10, 2625-2628, October 1999
© 1999 European Society of Human Reproduction and Embryology

Hepatocyte growth factor concentration in the early second-trimester amniotic fluid does not predict fetal growth at birth

Yohichi Ohnishi1, Chizu Yamashiro, Toshihiro Yanagihara and Toshiyuki Hata

Department of Perinatology, Kagawa Medical University, 1750–1 Ikenobe, Miki, Kagawa 761-0793, Japan

The purpose of this study was to evaluate whether hepatocyte growth factor (HGF) concentrations in the early second-trimester amniotic fluid predict fetal growth at birth. HGF and insulin-like growth factor-I (IGF-I) concentrations in the early second-trimester amniotic fluid were measured in 12 pregnancies with small for gestational age (SGA) infants, 84 pregnancies with appropriate for gestational age (AGA) infants, and eight pregnancies with large for gestational age (LGA) infants. HGF concentrations were measured from the early second-trimester amniotic fluid samples using an enzyme-linked immunosorbent assay. IGF-I concentrations were measured from the early second-trimester amniotic fluid samples using an immunoradiometric assay. Maternal age in AGA group (34.2 ± 5.5 years) was significantly lower than in SGA (37.9 ± 3.0 years) and LGA (37.6 ± 3.3 years) groups (P < 0.05). There were no significant differences for parity or gestational age at amniocentesis among the groups. There were significant differences for birth age, birth weight, neonatal height, and placental weight among the groups (P < 0.05). HGF concentrations in SGA, AGA and LGA groups were 16.9 ± 6.6, 16.7 ± 9.0 and 20.2 ± 14.8 ng/ml respectively (not significant). There was no correlation between amniotic fluid HGF concentrations and birth weight, height or placental weight. There were also no significant differences for amniotic fluid IGF-I concentrations among the three groups. These results suggest that differences in HGF concentrations in the early second-trimester amniotic fluid do not predict fetal growth at birth. Further study is needed to clarify the role of high HGF concentrations in early second-trimester amniotic fluid during pregnancy.

Key words: amniotic fluid/early second-trimester/fetal growth/hepatocyte growth factor/insulin-like growth factor-I

1 To whom all correspondence should be addressed


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