Is fetal gender accurate based on heart rate?

Patient's question:

No

Doctor's answer:

Because sometimes the female fetus enters a sleep state while listening to the fetal heartbeat, the fetal heart rate may be slightly lower than normal. At other times, the male fetus is active inside the mother's abdomen when the doctor measures the fetal heartbeat, so the fetal heart rate may be higher than normal, even exceeding 145 beats per minute. Therefore, multiple fetal examination reports from the expectant mother are needed to roughly determine the gender.