I had 3 non synto enhanced third stages. Although they did clamp quick and give a tug every now and then. I remember with my first they were unhappy with how long it was taking and threatened me with needles! The third was fine at first - only it wasnt very phys. Lyta went pass the parcel and I was exhausted, so I did suffer a large pph. Since then mine have been completely managed.

So 1 out of 3 went sour and none really followed a true phys third stage.

However, my mum had 7 kids, all natural births, all but one were true phys third stages - no complications at all.