Small-for-gestational age refers to an infant born with a birth weight less than the 10th centile . We can divide them into two types . Some fetuses are normal (constitutionally) small , others are non placenta-mediated growth restriction (for example: structural or chromosomal anomaly, inborn errors of metabolism and fetal infection) and placenta mediated growth restriction.
There are several factors responsible for SGA . Maternal factors can affect placental transfer of nutrients, for example low pregnancy weight, under nutrition, substance abuse or severe anaemia. Medical conditions can affect placental implantation and vasculature and hence transfer, for example pre-eclampsia, autoimmune disease, thrombophilias, renal disease, diabetes and essential hypertension. This video is about all the important factors responsible for SGA.
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Негізгі бет Small for Gestational Age, RCOG guideline
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