I have a doubt about my cervical length. I had my USG at 30weeks and it shows 4.1 as cervical length. is it normal and what does it mean...

yes it's alright.
The length of cervix is measured on ultrasound and also to see if it's closed as is the case normally.
A short or open cervix can lead to a preterm delivery hence the need to check it.

It's usually 4.1-4.2. In that case it's normal

The cervix is the mouth of the uterus at the vaginal end. During pregnancy it is long and thick and tightly closed. The minimum is expected to be 2.5 as long as the internal os is closed and it is not reducing as a pattern. A 4.1 is normal.

thanks Nazeema and Sonali...

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