These discrep-ancies have usually been examined by factors such as In the past, sudden and unexplained stillbirth occurred(1) increased metabolic ef???ciency during gestation,73 (2) in 10 to 30 percent of pregnancies complicated by typedecreased maternal activity,74 and (3) unreliable assess- 1 diabetes mellitus insulin-dependent diabetes mellitus,ment of food intake.75 (IDDM).80,81 Although relat