how accurate are ultrasounds in detecting the sex of a baby? what about the speed of the heartbeat?

Question

i had an ultrasound last week and it took the lady quite some time to figure out what hte baby was. then all of a sudden she just said w/o much energy-- "its a boy". looking at the screen, all i saw was 2 dots... now i have two other kids, a girl and a boy... and my son had a noticable penis and my daughter had just two dots. i "knew" what i was having with both of my previous kids and felt like i was having a girl this time and was really thrown off when she said it was a boy. so do u know the margin of error for ultrasounds to detect a baby's sex? also, this baby's heartbeat is slower like my daughter's was. its between 130 and 150 bpm... whereas my son's heartbeat was around 180. is that just a wive's tale or do you think its true that girls have lower heartbeat rates and boys highter

Answer 1

Heartbeat rate has no clinical basis at all...if your ultrasonongrapher saw obvious male parts then you are pretty accurate...but if she said female I would say there may be more of a margin of error.