I have two moms currently on mat leave and one just finished in nov .... The one that finished in nov kept the older child in full time for three months after the new baby was born and then did alternating weeks of three days and two days ..... I have a spot opening up for sept and they were supposed to start after thanksgiving but at the last minute changed it to mid nov I was rather ticked but whatever .... The next one is a school teacher and she pays for part time during the summers anyway so she kept the older child in full time for 5 months after the new baby was born and is now on 3 days/week at my part time fee and new baby starts integrating this summer after the civic then my most recent one says she is going to keep him in full time for her entire mat leave as the price difference not that significant and while she doesn't plan on bringing him every day it gives her the option ..... I love that choice as I like the full time fees ....
It has just worked out that I always had a space opening up right around the same time the new baby was to start.