That's really reassuring, cause this is my first pregnancy. So when they they found this out they can't say wether it's normal for me or not with out a previous pregnancy to compare to. I go back on the 28th for a retake, current my cervix is 24mm if if goes down to 20mm by then they will suggest progesterone.
I have short cervix too at 20weeks w this pregnancy I was high risk for about a month so I had to go in every week to get check but my cervix havnt changed one bit and I'm 34w and 2day