Review Article

Extrinsic Factors Influencing Fetal Deformations and Intrauterine Growth Restriction

Table 1

Types of congenital anomalies.

MalformationsDisruptionsDeformationsDysplasias

(i) Morphologic defects resulting from intrinsically abnormal developmental processes(i) Breakdown of, or interference with, an originally normal developmental process(i) Abnormalities of form or position of a part of the body caused by nondisruptiveme chanical forces(i) Abnormal structure because the tissues, from which individual structures are formed, are abnormal
(ii) Occur early in embryogenesis(ii) May occur at any time during gestation(ii)   Usually develop during the second half of pregnancy(ii) Often due to single abnormal genes