Because we had some risk factors for premature labor (twins being the biggest one!) we were sent for an ultrasound to determine cervical length at 17 weeks. The way it was explained to me, we were there to check for early shortening (which was unlikely) and to provide a baseline so that we could identify future concerns.
So in we went, and after our customary hour wait we got to see a tech and do the scan. Lots of clicking, and measuring, and a quick view of baby A's goodies...it's a girl! Then more waiting while the tech just goes to 'check and make sure she got all the measurements she needed.' (It sounded like a quick proposition, but of course, not so much!) When the tech finally returned she cheerfully told us she had everything she needed and that we would need to schedule another ultrasound for the following week. This was unexpected.
It turns out they expect normal cervical length to be between 3 and 6cm. Their criteria for concern is anything under 2.5cm. My measurement was 2.4cm. Apparently it wasn't too much of an issue since we didn't even see a doctor. But I decided to take it easier anyway, perhaps there's more to this growing two babies thing than I thought. When we returned in a week my length had gone back up to 3.1cm! But the tech said they would want to recheck next week?!? When we went to schedule it, it seemed like they were having problems finding a slot for us. The scheduler went to ask the doctor (I assume about where they could cram us into his schedule) and when the doctor came out he said I didn't need an appointment, that my cervix was fine. So I made a comment to verify that I didn't need to worry about this. He said worry no, be concerned yes. So that wasn't super reassuring. But we made an appointment to go back for our big anatomy scan and cervical recheck in a few weeks.
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