FREE: Fetal Weight

394 2 0
                                    

ESTIMATING FETAL WEIGHT: JOHNSON'S RULE

This can only be used in cephalic vertex presentation.

Formula:

A. For vertex above the IS: subtract 12 (constant) from the fundic height, then multiply by 155 (constant)

FH - 12 x 155 = FW in grams

Sample Problem A:

Sample Problem B:

B. For vertex below the IS: subtract 11 (constant) from the fundic height, then multiply by 155 (constant)

FH - 11 x 155 = FW in grams

Sample Problem A:

Sample Problem B:

Nurse ZWhere stories live. Discover now