Wrong gestation age – amma: Pregnancy & Baby Tracker Review

My baby is due 7/15/2020 when you put that in it says I’m 12w6d. That’s wrong. I’m 12w5d. Look up anywhere else and it says the gestation age with a due date of 7/15/2020 is 12w5d ?
Review by Flemminster on amma: Pregnancy & Baby Tracker.