My first two pregnancies were girls and they were identical. Sick until about 12 weeks and then from that point on felt as normal as I do on any given non-oreg day.
This pregnancy (though I don't know yet) I am strongly convinced is a boy because I am STILL frickin sick and I am 15 damn weeks!! I am on a prescription it is so bad and I have also been to the ER for not being able to keep anything down for 3 days (including liquid). So far this pregnancy has been a damn nightmare as far as sickness!! I'll update when I find out for sure, though again considering the first two, I am pretty convinced.