Galactosemia (G) is due to either partial or complete deficiency of the enzyme galactose-1-phosphate uridyl transferase (Ts). In females with G, there is a high incidence of premature ovarian ...

It may also be due to metabolic derangements like galactosemia in the child or genetic defects. 'The other category is developmental cataract. In this case the child was not born with it.