Guys, I've been doing a thing that you might like. Do you know ask.fm? So, about two months ago I found a guy in that site that was offering girls likes in exchange of a challenge to push their bellies out. Some times it'd work and sometimes wouldn't, and the girls would take pictures of their bellies and posted. I decided to do the same, and here are some of the pictures I collected. I will ask you please, don't post it anywhere else, for I wish no harm to these girls. My technique goes as it follows:

I ask them the question: "have you ever pretended to be pregnant by pushing your belly out?" or "how far can you push your belly out?" and variations od the same. If the girl answers no, I do not insist, only when the answer is positive I allow myself to go further.
If she says that she says yes, them I'll ask her if we can compare the size of our bellies, and only if she's willing to do it, you'll continue.
Since I live in Brazil, I've been trying this with brazilian girls, but you can do with the girls of the country you live in, in your language.
I'm using a fake account, in which I'm a girl, since they tend to trust other girls more than guys.
Note: Don't do it with any girl. You have to read some of their former answers before asking, so you can evaluate if she's likely to do it or not. Also, if there is any other question about this before, don't ask again.

I just thought I should share this with you guys, I do hope you try it, and post here your own findings.

The pictures below are a mix of my findinds and the findings of the other guy I met, I don't know his name. Enjoy!

I forgot one piece of information: I do give them a picture of myself in return. Since I've recived the gift of being kind of "girly", I give them back a picture of my belly, so it looks more belivable. This is one of the photos I took to look like a girl, I used a shirt like fake boobs, plus my belly isn't hariy.
I could have used any picture in the internet to pass as my own, but I like to be authentic, or at least as authentic as possible.    

Here are some more. come on guys, tell what you think.

just tried with no luck. oh well, it was worth a shot

Most of the time you'll won't at the begining. I'm chosing naïve girls, I try to find posts with a lot of spelling mistakes, pictures that show a little too much, it takes time and dedication to this. But don't give up, you will get the way of this, eventually you'll get lucky.

It could be that you're doing it with Brazilian girls and I'm doing it with Americans

Here are some more.

more.

does anyone have any photos of ladies dressing up pregnant?