How many do I take a day?

Ashy • I have two amazing boys, born 05-30-2015 and 04-07-2017 and we are going to have another baby in December 2018😍😋
I got new prenatals... And they have a. Serving size of 2 but I thought you only take one a day? Confused it doesn't say all it does say is don't exceed dosage.... Okay??