Final answer:
Fetal heart tones can be first heard during the 10th to 12th week of gestation, and the normal rate is around 120 to 160 beats per minute.
Step-by-step explanation:
The fetal heart tones can be first heard during the 10th to 12th week of gestation. At this point, the baby's heart is fully formed and beating regularly. The normal fetal heart rate is around 120 to 160 beats per minute.