To the OP, yabu to post this as its the wrong forum as its full of mothers of both genders who can't help but be unsupportive as how could they understand, imo yanbu.
In the States, Gender Selection is legal and it is called "family balancing", and although it may seem like a fluffy name for choosing your gender "balancing" is very much a real need for many women.
Why do we in the UK expect ourselves to suffer? oh, no sorry we don't, we're allowed cosmetic surgery, new limbs, gay marriages, surrogacy, sperm donation etc etc.... we just seem to be slightly behind on gender selection!! nothing wrong with wanting to create a life or to save a life, we all have this one chance at life so make the most of it! people have children for all the wrong reasons all the time, to be able to choose can't be a bad thing? implying the OP has other issues is funny!!
IVF is no guarantee anyway and if it fails, its a better fail than to fail at trying naturally for a girl and getting a boy who she would always wish was a girl.
To those women here that have had 3 or 4 boys and no girls, seriously you're saying you would NOT like to raise a dd?
At least the OP is not considering termination, shocking its available until 24 weeks gestation!