A member asked:

21 weeks pregnant cervical length was 39.8 mm 2 weeks ago today it's 36.1 mm is this okay?

2 doctors weighed in across 2 answers
Dr. Brian Nadolne answered

Specializes in Family Medicine

Normal: This early in the game i would not continuously be checking the cervical length. Enjoy your pregnancy, as there will be minor variations and constant changes over the next few months.

Answered 1/16/2016

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Dr. Howard Shapiro answered

Specializes in Internal Medicine - Nephrology & Dialysis

Normal values for cx: The cervical length decreases during the course of pregnancy. Both values are well within the normal range for 19 and 21 weeks of prognancy. If the cervical length falls below 25 mm before the end of the 28th week, there is an incresed risk of pre-term delivery and your obstetrician will monitor you more closely.

Answered 3/20/2015

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