Any type of abnormality in the growth of the baby in the mother’s womb is called a fetal growth problem. Fetal growth is considered a problem if the newborn weighs 6.2-9.2 pounds and is less than or more than 19-21 inches tall, or if it lands before 37 weeks of gestation. The problems can be divided into two categories.Genetic and chromosomal problems and Problems with teratogens.