With my first pregnancy I felt movement at 16 weeks on the banger. (posterior placenta) My other three babies had anterior placentas and I felt them around 18 weeks.
This baby I have a posterior placenta and I first felt movement last Monday. I measured 14 weeks on u/s but only 13 weeks 1 day by my dates. Because I have felt them before I know that it's the baby. I wonder if it's to reassure me a little... But it's so beautiful... There is nothing in the world like it. I cried!