I want to get the message out to woman that may not know about this. I learned only after it was to late. I lost my son 3 weeks ago I was 21week6day. I never felt any pain or had any bleeding I just woke up and felt something was not right an hour later my son was born. I was told my cervix had opened with out my knowing. I have two other children with no problems and had my cervix checked at 15weeks and it looked fine. I know now that at 20weeks or so the weight of the baby can make your cervix thin. You will feel nothing. Anyone that has had this happen needs to get a stitch if you become pregnate again. If only I had known I would of had my cervix checked more often in my 5th month.