Echoing ArtK-- wait until after
the baby is born.
Ex-In-laws from hell (ex-MIL, who would have dragged her husband, but did want to bring ex's 3 sisters, their spouses, adult niece and nephew to hospital delivery room) because they had planned on "seeing the whole show!" um...nope, no way, no how, my private region is just that, private.
We did as Artk said. Only my mom and dad knew (planned silence) when I went in to labor, my parents didn't even tell my siblings - first grandchild, even. 41 hours later, Phone call: "hey Mom, it's a girl!" thankfully, so few visitors, then home the next day.
Angry IL's all around, but happy mommy and baby was more important, TYVM.
***We blocked all but immediate family by name to be visitors. Who the eHell were the almost 60 people near rioting trying to get in to see the baby?! Ahhhh it was exMIL's 13 siblings-plus trying to get a peek to see if daughter "looked" like her father. Cuz, you know, baby's mama was surely a w*&%# and all.