Decrease in cervix length??

Manisha

Hey!!

Past three weeks I had scan which said that I had cervix of length 3.47cm with a little opening in it at 21th week.

Now,I had a sonography last week which says my cervix length is 2.8 cm at 23rd week of pregnancy ,with closed cervix.

How it can reduce in such a speed or this decrease is normal?

Please guide is the cervix length is OK this time or I need to be worried for it.

Kindly share your cervix length at 24th week of pregnancy. So,that I can get any idea for mine.