Your baby's heartbeat may now be audible through an instrument called a Doppler. By the end of the fourth month, your baby is about 6 inches long and weighs about 4 ounces.

Your baby's heartbeat may now be audible through an instrument called a Doppler. By the end of the fourth month, your baby is about 6 inches long and weighs about 4 ounces.

Photo by bkajayjhansi

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Stock photo: Your baby's heartbeat may now be audible through an instrument called a Doppler. By the end of the fourth month, your baby is about 6 inches long and weighs about 4 ounces. was taken by bkajayjhansi .