Join Dr. Sanjay Gupta as he goes inside a breakthrough organ transplant procedure.

Could the organs from animals be the answer for thousands of waiting patients?

Dr. Sanjay Gupta reports Animal Farm Sunday at 8 on CNN.

You've probably heard the term pregnancy brain or baby brain.

I have baby brain. I'm like in a different world. I don't know what day of the week it is, to be honest. It's a phrase that's often used to mean that someone is kind of scattered or unfocused.

I love baby brain. I mean, I don't know exactly. I'm not a scientist. But supposedly so that moms

focus on their baby, you can't really think of other stuff. And it's true because I can't really

think of anything else. That's Courtney Kardashian. And you know what? She's probably on to something.

Because the brain isn't static, even though we often think it is.

Our brains are changing, and they change throughout our lives, especially women's brains.

They change during the three peas, puberty, pregnancy, and perimenopause.

Now, for women, these transitions aren't just happening in the body.

They are happening in the brain as well. That's a really important point. And it's exactly what

cognitive neuroscientist, Dr. Laura Pritchett, studies how the brain actually changes across the many

phases of a woman's life. The reason I chose that field is because I was abutting neuroscientist as an undergrad,

interested in brain networks, and obsessing over how intricate everything was in the brain

to simply allow us to have a personality or remember things.

At the same time, in my personal life,

I was surrounded by menopausal women

who were talking about their cognitive complaints

and their attention issues, specifically in that time.

And I thought, we've got to connect these two together

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