Feeling fuzzy, forgetful and out of sorts? Are you pregnant Many soon-to-be moms report these symptoms during pregnancy.

"Hoo boy, did I ever have that," says Sharon Wren, mother of two boys from East Moline, Ill. "Actually, that's how I knew [son] No. 2 was coming, even before I took the test. I said 'Either I'm losing my mind or I'm pregnant again.'"

With her first pregnancy, Wren reports that she once forgot where she lived – after living there for years. "I didn't panic because I knew I had my driver's license in my purse and I could always look up my address," she says.

According to Dr. Robert Greene, a reproductive endocrinologist and OB/GYN from Redding, Calif., some common brain-related symptoms of pregnancy include forgetfulness, difficulty concentrating, fatigue and reduced coordination. "These are caused by natural shifts in hormones that are usually benign," says Dr. Greene, author of Perfect Hormone Balance for Pregnancy (Three Rivers Press, 2007).

We can't know how long "baby brain" has been around, but judging by responses to requests for these experiences, it's very common now. And it's probably not pregnancy that has changed, but that women have changed.

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