Average Income and Benefits. Certified medical coders earned average annual incomes of $25,920, according to the BLS. The lowest 10 percent made less than $21,680 per year. Eighty-five percent of these workers are employed full time, according to the BLS.
At about 18 to 20 weeks, it is possible to hear a baby's heartbeat with a stethoscope, states Health & Parenting. Typically a doctor uses a heart rate Doppler to listen to a fetal heartbeat, which can be heard much earlier than with the use of a stethoscope. Continue Reading.
Doctors use several different methods to listen to the fetal heartbeat. About 3 weeks, one day after fertilization, when the heart first begins to beat, the sound of the little heart is too soft to hear. Very soon thereafter, they can see the motion using ultrasound technology. A doctor's stethoscope is not sensitive enough to hear the embryo's heart beating.