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Complete trisomy 9 was diagnosed in a 35-week fetus by amniocentesis. Several sonograms had revealed only a two-vessel cord and intrauterine growth restriction. No other abnormalities were noted. A stillborn infant was delivered at 37 weeks gestation after induction of labor. J. Matern.–Fetal Med. 7:247–249, 1998.
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Roshanfekr et al. (1998) studied this question.
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