I'm 20 weeks and my mom.and my sister are going crazy I'm due November 9th and my mom.wants to have one in August or September
I'm due December 25 n I'm having my baby shower in October before the hoildays
Usually as soon as you start the third trimester anytime within then so 27+ weeks
Usually after you find out the gender
I would send out invitations in early august, so people have time to plan but not too much time to forget lol and about the in laws, I would talk to your fiance about what he wants to do about his family. Just out of respect for him so there's no misunderstanding or anything.
You typically have the baby shower within the last couple of months of the pregnancy..