I don't know what the laws around medical disclosure are in Georgia, but I just can't see any court anywhere that allows a defendant to claim a fake medical condition for sympathy. The fact that the prosecution is silent when they could simply say that they are unable to confirm any pregnancy indicates to me that she really is pregnant.
And keep in mind that we are only getting a two-sentence summary of a much longer hearing. The court may very well have acknowledged her pregnancy and discussed medical care, etc. during the proceedings, but the reporters don't care about that. In fact, they probably don't even speak Georgian anyways, so they are only reporting what Bella says in English and her exchanges with her mother.
In any case, I don't see how this would help her with a plea deal. The state certainly knows if she's pregnant or not. Why would they make a plea deal because someone claims a fake condition?
Edit - Here you go...from a July 1 Mirror article. The judge in the case acknowledges her pregnancy.
The judge Lela Kalichenko told the court that Bella, from Bellingham on Teesside, is pregnant and had not committed any crime before. She seems young and the family supports her, the judge said. Bella says she was forced to take the case and did not know what was inside, the judge added.
In an emotional court appearance in Georgia, the 19-year-old said: ‘I didn’t want to do this. I was forced by torture. I just wanted to travel. I study at the university… to become a nurse.’
www.mirror.co.uk