باروری و ناباروری ایران

vitamin A

770 mcg/day 

vitamin A deficiency 

xerophthalmia 

night blindness

anemia

susceptibility to infection

vitamin A deficiency  endemic

daily supplement less than 10,000 IU

3000 mcg  retinol  

a weekly supplement less than 25,000 IU 

8500 mcg  retinol

DR NOORZADEH ,Perinatologist