I'm going to call my OBs office tomorrow, but wondering if anyone has has anything like this happen? I'm 28 weeks along and these are the backs of my legs. I have not experienced any falls or trauma to the back of my legs and didn't know how bruises they were until my 4 year old commented when I put on shorts today. Yesterday she sat on my lap while we were at the movies (the theater and chairs are older and not so comfy) and that's the only possibility that comes to mind for the cause, but these are so bad. Worried it could be platelets or something but wondering if anyone else has experienced this and got answers? TIA!!