I'm 1-2cm and have been since 32 weeks. This is our third pregnancy, the doctor said it can sometimes be normal to dilate a little early and it didn't mean preterm labor was imminent. I don't think they know much about it though as most women don't get checked this early. I was having contractions that they stopped at the hospital. Not pre term labor, but "irritable uterus". I'm fairly confident that we will still carry to term.