We've all heard about crazy pregnancy cravings: Pickles with ice cream, dirt, flavored potato chip crumbs -- just the crumbs. Sometimes a craving is just a craving. You're feeling emotional and a certain food just feels right. But a crazy food craving could also mean there's some nutrient you could use a little more of in your diet. So here's some cravings we've had heard about -- some bizarre, some totally predictable -- and what your body might actually be asking for.

I don't mean to alarm anyone, but Kim Kardashian likes frozen yogurt. The startling realization comes after she was photographed chowing down on the cold, creamy treat in L.A. wearing a white, flowy sheet. It's to be assumed that the pregnant reality star is now craving froyo, which she tops with fresh fruit, not candy.

I hope you're sitting down, because it gets even more interesting, if you can believe it.

Eating while pregnant can be full of challenges, but I'm not sure anyone's cravings have been quite as confusing as Kim Kardashian's. If we're to believe reports, she's simultaneously eating everything and nothing and is soon going to reach 500 pounds. 

Some reports say that she's binging on junk food. A source recently told In Touch that's she's eating ice cream, fries, and cereal loaded with sugar. While that's not the healthiest diet, it's certainly nothing that plenty of pregnant women who have gone before her haven't consumed.

Kim herself says her cravings are nothing like that nor are they anything like she expected them to be. In fact, she said they're quite upsetting.

Well, moms-to-be, I've got some good news and some bad news. The good news is, you may be able to lessen the chances of your baby being a picky eater simply by paying attention to what you eat during your pregnancy.

But guess what? That's the bad news too. Because new studies have found that eating green vegetables during pregnancy increases your baby's chances of preferring healthy foods.

Sigh. No more doughnuts. No more pizza. No more stuffing your face full of every delicious thing you can get your hands on -- otherwise you may wind up with a very fussy eater on your hands.

Once you get knocked up, there's no end to the advice you get -- especially about everything that's now "forbidden" for you as a pregnant woman. Don't eat this, don't wear that, careful what socks you wear, should you even still breathe oxygen?!? Ha, I'm exaggerating, of course.

How much of this advice is actually based in fact, and how much of it is just old wives' tales? Sure, you could err on the safe side and just wrap yourself in bubble wrap for nine months. But you still need to live! A North Dakota newspaper asked some OB-GYNs to dispel a few pregnancy myths. Here's what they had to say about the dos and don'ts of pregnancy.

It's been almost a decade since I was pregnant, and I can't believe how much ultrasounds have changed. You see so much more detail now! It's incredible. And that goes for other kinds of imaging. Digital imaging lets us see our babies' development in amazing detail.

Alexander Tsiaras is a dad and a scientist who works with digital imaging to study fetal development. He wants you to see this gorgeous video of a fertilized cell developing into a baby. But he also wants us to know that getting such a close-up view has totally changed how he sees pregnancy. And what he's seeing has got him worried. We know that we need to eat healthy when we're pregnant. But could we actually be poisoning our babies by eating the wrong food?

She may not have come right out and confirmed her baby news yet, but pretty much everyone who's anyone is convinced that Jessica Simpson is pregnant with her second child.

She's wearing baggier clothes. She's carrying humongous purses in front of her alleged growing belly, and oh yeah, it appears as though she's kicked her strict Weight Watchers diet to the curb, which has to mean she's preggo, right?

I mean, considering Jessica recently ordered a grilled cheese sandwich, onion rings, and a ginger ale while dining at the Polo Lounge in Beverly Hills, I'd say she's not too worried about maintaining her girlish figure at the present moment, which is very indicative of a bun in the oven.

If you've ever felt like you are getting mixed signals when it comes to whether or not you're allowed to eat fish during your pregnancy, you're out of luck -- because things just got even more complicated.

A new study has uncovered a link between exposure to mercury during pregnancy and ADHD symptoms in kids -- and as we all know, certain types of fish and mercury tend to go hand in hand. But what's really strange is that while the research determined that mercury exposure can lead to ADHD -- it also concluded that consuming more fish can actually result in a lower incidence of ADHD.

(What the heck?) Are we supposed to eat fish while pregnant or not? Or are we basically setting our kids up for hyperactivity -- regardless of how much fish we eat? (What's a mom-to-be to do?)