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What is the difference between a 2 MHz probe and a 3 MHz probe?

April 26, 2017difference MHz probe

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What is the difference between a 2 MHz probe and a 3 MHz probe?

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The main difference is that the higher frequency probe reflects off smaller objects. A 3 MHz probe works better off smaller fetal hearts. Many OB/GYN’s prefer a 3 MHz probe. It seems to pick up heart sounds earlier in pregnancy and also works well later in the pregnancy. A 2 MHz probe may be better when used on a heavier mother. BabyFM units have interchangeable probes. If you are unsure about which on to use, consult with one of our customer service specialists, they will help you determine the right one for you.