I don't believe she had it either it was the shortest pregnancy ever and the dates just didn't add up.
Even when she was pregnant other parts of her body stayed the same usually a woman gains weight in the face,boobs etc.
There is a massive business specialising in fake baby bumps.
Online for people who are unable to have kids to give the illusion they are carrying the baby.
Also the fact that matthew knowles mistress said he wanted to give the baby to beyonce I suspect she can't have kids.
And instead of admitting it had a fake pregnancy just my opinion either way the whole thing felt dodgy to me.