Progesterone numbers

mommy of boys • 14/05/2014 - beautiful baby boy born 💙👶🏼 13/03/2017 - another gorgeous baby boy 💙👶🏼 Currently trying for baby #3👶🏼👶🏼👶🏼
So is 25 low for cd16 (the day of ovulation) my doctor said it should be over 30 .. I mean 5 of a difference can't be that bad surely xx thanks in advance