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


• Bartholomew's rule of fourths is a method used to determine the estimated age of gestation of pregnancy in relation to the fundal height. In 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:

• Symphisis pubis - 12 weeks
• Midway between symphysis pubis and umbilicus - 16 weeks
• Umbilicus - 20 weeks
• Xiphoid process - 36 weeks to 38 weeks

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