What signs did your LO have that made you think or know they were going thru the 12 week growth spurt?
My dd will be 12 weeks on wednesday and her eating hasn't changed yet but she is a little more fussy and changing her normal routine of things that she used to like before.
Re: 12 week growth spurt
He also started sleeping a lot more. Just this past week, at 12 weeks, he started being ready to go down for the night at 6:30, and he would stay asleep until 2 or 3 am. He even STTN until 6am once.
Def increased appetite and to some extent fussiness.
Also he would suckle on his hands more and more. But I'd say that excess sleeping, eating and cranky baby when these don't happen are all telltale signs.
Good luck, my LO's was not too bad--mostly sleeps and nurses ALOT.
this is z to a tee. 13 weeks today. i think its a mental spurt.