Mom Flying in from Israel when Baby is due

Yael • My baby girl is my WORLD

Our daughter is due September 14th but I seriously need advice. I'm not sure if anyone has any idea how we should do this, but my mom plans on flying here (USA) from Israel for when our daughter is born and staying for a month to help out, spend time with me and her (since she lives so far), and make sure I am okay. Problem is we have no idea when she should fly in. I'm a first time mom and have NO idea when she will decide to come out. 25 weeks 5 days right now with no complications so far. I want her to be able to be here when she is born and get to spend at least near a full month here, but we have no idea how to time it at all. My mom could come too early and waste precious time waiting around, or plan to come near the due date and my daughter comes early and she isn't there. Does anyone have any experience in something like this or any idea what we could do???