Do you guys count baby's age by the week or the number/date of birth??! Ex: tomorrow mini is 20 weeks old but on the 18 is when she's considered 5 months. 20 weeks IS 5 months to me!! Lol what do you guys think?
I'm pretty sure it has to do with the number of days that month has. I went by weeks til my son was a month old then just stuck with months til he turned one...just as confusing as pregnancy months vs wks... lol!!