When does 2nd tri start?

[susied]

Hey ladies! When do u move to 2nd tri? Is it day one of week 13?

 

[Beautiful11]

Hey ladies! When do u move to 2nd tri? Is it day one of week 13?

I’d say so x

 

[bdb84]

I go by the start of 13 weeks.

 

[dizzy65]

I usually go by the start of the 13th week