Anne Lamott wrote that each baby comes out clutching a third of its mother’s brain. And in my experience, that feels about right! Just the other day, I warned my husband that I may be experiencing early onset dementia.

Baby brain exists

Most moms have experienced what is known as “baby brain” or “momnesia.” And sure, sleep deprivation has a lot to do with why many of us feel a bit… dimmer after giving birth.

But is there more going on besides the missing Zzzs?

Turns out, our brains really do undergo some surprising changes during pregnancy.

Here are five crazy ways pregnancy changes your brain

1. Your brain shrinks… literally

It appears that there may be a physical component to “baby brain.” Researchers at Hammersmith 
Hospital in the U.K. discovered that brains of healthy pregnant women decreased in size by up to six percent! Fortunately, women’s brains return to their pre-pregnancy size six months after delivery.

2. You get filled with love hormones

Oxytocin, or the “hormone of love and bonding,” is something we release naturally during pregnancy, childbirth, and breastfeeding. Oxytocin makes women calmer, more trusting, and more open to love. In fact, levels of oxytocin in pregnant women can even predict mother-child bonding.

While oxytocin amps up the love within a family, it can also increase defensive aggression toward people outside of the family group, which explains the phenomenon of Mama Bear. Grr….

3. You get great at recognizing faces

Researchers at McMaster University recently found 
that pregnant women are significantly better at recognizing faces – men’s faces in particular. Why? Well, one theory holds that women become particularly vigilant toward men during pregnancy, to quickly spot – and avoid – threats.

4. You become a master multitasker

We already know that women are better at multitasking then men. Apparently, the performance gap widens even further during pregnancy, when activity increases in the prefrontal cortex, the part of our brains in charge of multi-tasking.

5. You get smarter

Wait, isn’t the whole “baby brain” thing supposed to be about moms losing some of their wits? Not quite. A study out of Yale study found that motherhood sets off structural changes in the brain, increasing its processing capabilities. And the more doting moms are on their babies, the smarter the mothers become! YAY!

So maybe “Momnesia”, aka baby brain, ain’t all bad?

Apparently not! Which is encouraging news. Just because I can’t remember what day it is, or when the baby went down for a nap, doesn’t mean I’m less intelligent. It just means that I’m running on less sleep – and maybe that I’m dedicating more mental resources to loving my kids.

One last bit of good news about baby brain

In laboratory tests, pregnant rodents experienced many of these same benefits (better multitasking, spatial skills, decreased anxiety). But here’s the kicker: the rats enjoyed these benefits of pregnancy throughout the rest of their lives, long after their babies grew up. Hey, so we’ve got that going for us too.

How about you?

Did you experience baby brain or “momnesia?” Do you think pregnancy or motherhood changed your brain for the better? Share with us in the comments below!