Expert answer:
These are independent events, the son of a pregnant woman may have anemia because this is a disease that anyone can have and not because the mother during pregnancy had anemia.
If a pregnant woman has anemia in pregnancy when her child is born, she will have anemia in the future.
These are independent events, the son of a pregnant woman may have anemia because this is a disease that anyone can have and not because the mother during pregnancy had anemia.