An apparatus for detecting a fetal heartbeat includes circuitry to convert acoustic energy representative principally of a maternal heartbeat into a first electrical signal and circuitry to convert acoustic energy representative of a maternal heartbeat and a fetal heartbeat into a second electrical signal. The apparatus also includes circuitry to process the first and second electrical to provide an electrical signal principally representative of the fetal heartbeat and circuitry to determine pitch periods of the signal principally representative of the fetal heart beat.