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Date of last update: 10/14/2017.

Forum Name: Obstetrics

Question: prenancy

 jtlivewire05 - Wed Feb 02, 2005 12:26 am

last week at my doctor measured me at 35 weeks now this week i am measuring at 33 weeks how and why could this be?
 Shelly S, RN - Wed Feb 02, 2005 10:03 pm

Hi there,

At times, your measurements can vary per appointment. It is usually harmless, and there could be a lot of reasons for the change in centimeters. First off, when a different doctor or nurse measures you, their number could vary from the previous person's number. Also, if the baby is in a different position, that could also vary the number.

Usually, the number in centimeters will match you number in weeks but could vary by +2 or -2 centimeters.

Hope this helps,
Shelly, SN
 Dr. R. Kothari - Wed Feb 02, 2005 11:46 pm

The difference in measurements could be due to any of the following:
1. Different people measuring
2. the fetal head getting engaged, thereby reducing the fundal height.

A sonography could accurately estimate the gestational age, however as the pregnency
advances the measurement have a +/- 2 weeks variation.

Hope this helps.


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