Basically, the Jericho 9 and the Yarmoukian cultures were contemporary and not geographically isolated; until now it was thought they were isolated, and before that, that Jericho 9 was later and took over the same areas from the Yarmoukian.
It may not be knowable, but it would be interesting to know if these figurines resembled the mature women of the day or if this was some kind of exaggerated, ritualized view of female fertility.