Low PAPP-A hormone

Michelle

Just got my downs screening letter through which said I had a 1 in 875 chance of a down sydrome baby but my Papp-a is low. does anyone else have this? I was a small baby myself (7.4) and my mum said they tried to give me growth hormones when I was born but she refused. I'm 5ft and am the same height as everyone else in my family. What's going on?