Do babies make people stupid?

I'm due on Saturday, and my mom and mother in law say the most stupid things ever lately. Neither of them are spiritual or superstitious, yet they are CONSTANTLY talking about fate.

For example, earlier this month they were both convinced my baby was going to be born on the 6th because of the full moon, my mother in law insists that my 11 year old brother in law "not wanting to go on a field trip" means that the universe is going to make labor happen tomorrow, my mom said the baby was going to come on the 24th because that was my due date when she was pregnant with me, and now because my baby has crossed over from aries to taurus without being born, my mom is convinced she will come on her birthday (the 30th)

OMG there is no rhyme or reason to it, the baby will come when she's ready and the stars being aligned or the moon being out or my brother in law not wanting to go somewhere isn't going to change that. These are rational women, do babies just really make people that dumb?