Hello, I would be happy to help you today,
Obviously you are pregnant, though you did not indicate how far along you might be. The answer to your question does not really depend on this fact, though.
You are correct, FHT's refers to the fetal heart rate
. Between about 8 weeks and 41 weeks, the normal fetal heart rate is somewhere in the range of 120-160. Between 6-8 weeks, it might even be a little higher than this range, but usually it settles nicely into this range. It tends to be towards the lower end of the range later in pregnancy
FM stands for 'fetal movement'. You can see the fetus moving very early, perhaps as early as you can see it clearly on ultrasound
and definitely by 12 weeks. And no, FM does not refer to the presence of free fluid in the peritoneum
If there is free fluid in the pelvis, there may be concern about a "ruptured cyst" or a pregnancy in the tube. As long as they saw a pregnancy in the uterus
, with + fetal movement, and a normal fetal heart rate, then I would be very reassured by what I saw.
I hope this helps. Good luck with your pregnancy!