A nurse is caring for a client who is pregnant and is at the end of their first trimester. The nurse places the Doppler ultrasound in which of the following locations to begin assessing for the fetal heart tones (FHTs)?

Choice A rationale At the end of the first trimester, around 12-14 weeks gestation, the uterus is still relatively low in the pelvis. The symphysis pubis serves as a reliable anatomical landmark for locating the fundus of the uterus at this stage. Placing the Doppler just above this bony prominence allows for optimal transmission of sound waves to detect the fetal heart tones. Choice B rationale The right upper quadrant contains structures like the liver, gallbladder, and part of the colon. At the end of the first trimester, the uterus is not typically high enough to extend into this region. Therefore, attempting to locate fetal heart tones in this area would be ineffective and unlikely to yield a clear signal, as the fetus is not yet positioned there. Choice C rationale Just above the umbilicus is the general location for assessing fetal heart tones later in pregnancy, typically during the second and third trimesters when the uterus has significantly enlarged and risen out of the pelvis. At the end of the first trimester, the uterus is still too small and low for the fetal heart tones to be consistently heard at this location. Choice D rationale The left upper quadrant contains the stomach, spleen, and part of the colon. Similar to the right upper quadrant, the uterus is not positioned high enough in the first trimester to extend into this area. Therefore, attempting to locate fetal heart tones in the left upper quadrant would be inappropriate and unlikely to be successful.