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Notice of inadvertent duplicate publication

underlying factor that causes both increased anxiety and diminished trophoblastic invasion. It is unlikely that the women in our study had reason to be concerned about the progress of their pregnancy, as we excluded those with pre-eclampsia or fetal growth retardation known before Doppler ultrasound. Although there are many contributors to fetal growth and birth weight, reduced blood flow through the uterine arteries could partially explain why women who are anxious during pregnancy tend to have smaller babies. It is also possible that this mechanism is related to some of the findings by Barker, 31 which have linked low birth weight to a later predisposition to coronary heart disease.