My DD suffered two miscarriages, for reasons unknown, but on both occasions her care fell far short of the ideal.
The first was a "missed abortion" or "blighted ovum", where the embryo had died, but the placenta kept producing hormones, so the "pregnancy" continued. It took a while for them to work out what was going on and by that time she as about 15 weeks. The contents of her uterus were removed by means of a mini labour - just as painful as the real thing, but with nothing to show for it. She was sent home to continue her life, but 2 days later she produced a sack about the size of a grapefruit with the products of conception in it - she was distraught, thinking that the doctors had been wrong and she was giving birth to a foetus in a sack. What had supposedly been removed at the hospital no-one knows. Her OH was instructed to scoop the sack and its contents from the toilet and take it to the hospital to be examined. A few weeks later she had to undergo a pregnancy test in order that a negative result might confirm that all was over - a traumatic method under the circumstances.
Another pregnancy went to about 8 weeks and she began to get severe pain. My OH (a doc) instructed her to ring the GP urgently. The response she got was to wait and see, and let her know the next day if things did not settle. OH went ballistic, as he was concerned that she had an ectopic, and told her to go to A&E. In fact she rang the nearby Nuffield hospital and managed to get an urgent scan, which was seem by the consultant and he got her admitted (under him as an NHS patient) as he was sure it was an ectopic. In fact, at operation, it was found that she had a large rapidly-growing cyst as well as being pregnant - the surgery resulted in her miscarrying.
Just to cheer us all up - she has two lovely children now! Not without some trauma as she suffered a very severe ante-natal depression with the second, and was extremely ill for about 4 months. But we have all come out the other side, and I have told her she must keep her knees crossed in future as we can't take any more!!!