Intrauterine growth retardation can be caused by all except –

Causes of LUG (small for date) Environmental Ethnic, racial and geographic Social and economic status Nutritional Maternal The short stature of mother Primi or grand multipara Young / adolescent mother (below 20 years) Low pre-pregnancy weight Smoking and tobacco or alcohol abuse Maternal illness : anemia, heart disease, malaria Complication of pregnancy : pre-eclampsia, hypertension Previous similar baby Placental factors Disorders of implantation of the placenta, abruptio placenta extensive placental infarcts and structural or function abnormalities of the placenta. Single umbilical artery vascular thrombosis also predispose to the birth of a small baby Fetal factors Firstborn babies are generally smaller Genetics or chromosomal aberrations Twining and multiple pregnancies Intrauterine infections Note:-  In CRF there is hypertension which is one of the causes of IUGR. Propranolol also causes IUGR.