At the start of Season 6 of Fear the Walking Dead, someone mentioned it having been a little more than 200 days since Virginia had taken the core group and split them up among her different communities. And, when Grace was taken at the end of Season 5, her pregnancy wasn’t very far along. That puts her at around seven or eight months along now.
Unfortunately, that also means she is going to deliver a baby while also being the victim of radiation and Virginia. That’s a lot of stress to put on anyone, let alone someone trying to survive in a new world.
Virginia seems to have kept Grace hidden from almost everyone else, except for a few trusted soldiers, to use against Morgan if she ever had to. And now that she knows her sister, Alicia, and Charlie are all on Morgan’s side, she might be ready to put her plan into action.
Source : https://www.distractify.com/p/fear-the-walking-dead-grace-pregnant-how-long