I had a 1500ml pph with my first (emergency section after long labour), I wasn't transfused despite hb of 6.8 BEFORE the bleeding - I couldn't walk up the stairs in our house for 6 months after the birth - they just gave me fluid replacement it was horrendous.
In all subsequent deliveries (4 more - 3 elective sections & an induced labour after intrauterine death) I had cross matched blood available (for those pregnancies I was anti-coagulated with increased the risk) but only needed it once after #3. #2 600ml loss, #3 1200ml, #4 400ml, #5 200ml. They used ergometrine as well as syntometrine each time. Oh & I had iv iron infusions before my 4th & 5th because I was already anaemic.