Spontaneous hypoxia in multiple pregnancies is associated with early fetal decompensation and enhanced T-wave elevation during brief repeated cord occlusion in near-term fetal sheep

Exaggerated elevation of the T/QRS ratio during decelerations in early labor may be a useful marker of greater myocardial anaerobic stress (eg, because of pre-existing spontaneous hypoxia), but not of the development of fetal acidemia or hypotension.