What is normal for cervical length?

scarletangel2006

Hey girls. Im not a first time mom but i may as well be with more technical information since i was so young with my son. I had an ultrasound at 10 weeks where they told me my cervix was a little over 5cm. From what i understand that is really really good. Yesterday i had another ultrasound (i have them monthly to monitor twin growth) and my cervix measured at 4cm. Now from what i researched 4cm is fine and not at all a concern. What im curious about is if its normal to see big jumps like that in length in short amounts of time prior to third trimester?

From what i read less than 2cm between 20 and 24 weeks can indicate preterm labor. I went into labor with my first at 36 weeks. Now im pregnant with twins and early is expected but 36 is our goal week to make it to.

That1didntcount

For what it's worth, at my 12 week appointment I asked about my cervical length and they told me that was something they would monitor at 20 weeks.