thanks mate will keep an eye on herwhen her belly goes flat at the bottom (squares off) Then you know she is really close to delivering. Your platy hasnt squared off yet, so I would say at least another week and a half to 2 weeks.
Take a look at this thread on here already:
http/www.fishforums.net/index.php?/topic/253113-how-to-know-if-your-livebearers-ready-to-drop-fry-updated-150410/
Good luck!!