Hello, Does any one know of any successful pregnancies while having MPN. ET. JAK2+? I am now 27 years young but 5years ago before I was diagnosed with MPN I had my son. He now asks for a brother or sister to play with. It is killing be because I am terrified of being pregnant first because of this JAK2 and second Because my son was born 29 weeks and after that I’ve had 2 miscarriages after that.