An Accurate Way To Find Out The Weight Of A Twin Fetus?

Illustration of An Accurate Way To Find Out The Weight Of A Twin Fetus?
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HealthReplies.com. Is TFU accurate for knowing the weight of multiple fetuses? Because at 29 weeks of pregnancy said my TFU midwife was only 30cm. And the midwife says my twin fetus is small. Are they accurate? Even though my fetus is very active. Thank you

1 Answer:

Hello, thank you for the question to HealthReplies.com

Basically uterine fundus height (TFU) is not an accurate examination to assess fetal body weight. TFU can indeed be used to monitor fetal development, but there are many factors that can affect the accuracy of TFU and twin pregnancy is one of them. In a single pregnancy, TFU will usually be the same as the gestational age in weeks (for example you are 29 weeks pregnant, then TFU will be measured 29 cm plus minus 2 cm). However, this cannot be predicted in multiple pregnancies because TFU will usually be measured to be greater than the gestational age. In addition, in twin pregnancies there is also no definite benchmark how high TFU should be for a certain gestational age because the variation is very large for each twin pregnancy.


In twin pregnancies TFU is usually measured continuously and seen increase from each antenatal visit. As long as you gain weight and increase TFU is also quite good, usually fetal development can also be assumed to be good. To find out for sure if your fetus is developing well and your fetus's body weight is also good, you are advised to do an ultrasound examination at the obstetrician. Twin pregnancy is basically included as a high risk pregnancy, therefore you are better advised to do an obstetrician's examination than to a midwife.

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