Diagnosis of twin pregnancy

On abdominal examination you may notice that:

  • The size of the uterus is larger than the expected for the period for gestation.
  • The uterus looks round and broad, and fetal movement may be seen over a large area. (The shape of the uterus at term in a singleton pregnancy in the vertex presentation appears heart-shaped rounder at the top and narrower at the bottom.)
  • Two heads can be felt.
  • Two fetal heart beats may be heard if two people listen at the same time, and they can detect at least 10 beats different (Figure 8.6).
  • Ultrasound examination can make an absolute diagnosis of twin pregnancy.

Figure 8.9 Two people can listen for twins, by tapping in rhythm with the two fetal heart beats.
Last modified: Monday, 14 July 2014, 2:29 PM