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