I have 2 boys right now (this is my 5th pregnancy, hopefully we will finally get our girl this time, because this one I have not been as sick as with my boys).
I had Hyperemesis with both of my boys, lots of nausea in the first trimester and throwing up for me. I barely was able to eat with them until the 2nd trimester. Only a small yogurt with fruit on good days. Or some bread.
Heart rate for both of them was above 140 bpm (that myth was not true for us).
I knew with my youngest son that he was a boy right away because the pregnancy with him was exactly the same as my oldest. I had no doubt and sure enough it was confirmed.