In order to determine whether the decrease in taurine concentration in the placenta during pregnancy could affect fetal development, as has been observed in animals, we measured the concentration of taurine in placentas obtained after vaginal expulsion. 31 placentas from women with normal pregnancies of over 37 weeks who have given birth to infants of normal weight (3,200 +/- 310 g) were included in the study. In addition, 26 placentas of infants considered to be hypotrophic were also included (gestation over 37 weeks, birth weight: 2,260 +/- 230 g). The taurine was assayed using gaz-liquid chromatography. The concentration of taurine in the placenta was 2.80 +/- 0.56 mumol/g for the placentas of normal birth weight infants and 2.40 +/- 0.64 mumol/g for the placentas of hypotrophic infants (p less than 0.02). There is no significant correlation in normal and hypotrophic newborns between the gestation period, the weight and height at birth, the weight of the placenta, and the taurine concentration in the placenta. The taurine concentration in placentas of hypotrophic born infants is significantly reduced compared to the placentas from normal infants.
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