This paper explores the relationship between emotional factors and "psychogenic" obstetric complications (those involving no discernible physical cause) by reviewing the pertinent articles that have appeared during primarily the past 15 years. The literature provides no conclusive evidence of causal relationships between emotional factors and such complications. The most consistent findings were that women who subsequently experienced any of a variety of obstetric complications had higher anxiety levels and used fewer repressive-type defenses than women who experienced normal pregnancies and deliveries. These findings are discussed in terms of the presumed causal role of emotional factors in psychogenic obstetric complications. XHEGNANCY is widely recognized by obstetricians (and husbands) as an event precipitating profound changes. Foremost and extensive among these changes are normal physiological adaptations: the numerous hormonal 1 changes triggered in response to the increasing maintenance demands of the rapidly developing fetus. Psychological adaptations are also apparent. There is general agreement that even a normal pregnancy constitutes a period of transient ego vulnerability marked by at least minimal regressive changes. 2 " 9 At another level are the anticipated changes in the family unit-a shift from the primary husbandwife dyad to a more complex system of dyadic and triadic relationships. Harmony between these changes, particularly the psychological and physiological ones, is regarded as propitious-a sign of normal pregnancy.Growing evidence emphasizing the dismaying effectiveness of emotional factors in altering the outcome of and recovery from physical illness 10 has stimulated speculation that emotional factors may also adversely influence physiological changes during pregnancy. The recent increase of investigations focusing on the role of emotional factors in obstetric complications attests to a growing interest in possible causal relationships between emotional factors and obstetric complications. Preliminary reports have suggested emotional factors as a determinant in these complications, but due to the numerous complications, the diverse populations, and the heterogeneous methodology involved, definitive statements regarding the relationships are rendered difficult. A review of the current literature in this area, then, seems warranted, from a heuristic view-222