According to Bartholomew's rule, if the fundus is at the level of the umbilicus, the age of gestation is

Explanation

• Bartholomew's rule of fourths is a method used to determine the estimated age of gestation of pregnancy in relation to the fundal height. According to this method, all you need to remember are 3 landmarks: the symphysis pubis, the umbilicus, and the xiphoid process.

• When the fundus is at the level of:

    • Symphysis pubis - 12 weeks

    • Midway between symphysis pubis and umbilicus - 16 weeks

    • Umbilicus - 20 weeks

    • Xiphoid process - 36–38 weeks

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