The most consistent clinical feature of BSyn, seen throughout all stages of life, is poor growth that affects height, weight and head circumference. This growth deficiency begins before birth, and the affected fetus is typically smaller than normal for gestational age. The average birth weight of affected males is 1760 g (range 900-3189 g) and of affected females, 1754 g (range 700-2892 g). Body proportions are nonetheless normal. The average  Read More

The most consistent clinical feature of BSyn, seen throughout all stages of life, is poor growth that affects height, weight and head circumference. This growth deficiency begins before birth, and the affected fetus is typically smaller than normal for gestational age. The average birth weight of affected males is 1760 g (range 900-3189 g) and of affected females, 1754 g (range 700-2892 g). Body proportions are nonetheless normal. The average  Read More