Mommy brain drain

Yesterday, in the lab, talking to 2 other moms:

Me: Just wondering...did you guys really notice a difference in your brain after giving birth? Like not just the first few months, but after that?

C: Oh my god. Totally.

J: As soon as that placenta's out, there go the brain cells.

C: I've had a terrible time focusing, being able to concentrate.

J: And those brain cells never come back.

Me: Oh thank god I'm not the only one. I swear my IQ has dropped 10-20 pts!

C: Exactly.

J: Oh yeah, and it doesn't get any better.

Yea, there's hope! Both of these women have given birth during their doctorates and are finishing their dissertations.