to not want a third child unless it is a girl, hence not to want one?

[Sexist]

DP and I have two lovely sons, and both feel we would like to have more children (especially since changes in parental leave would let me-Dad-stay at home).
But the costs would be huge, and change so much we would otherwise be able to do-we would have to stay put in a fairly crummy house on a council estate because of childcare costs, would have less money and time for our existing two children, and would postpone any sense of simple reliable independence or evenings off until into our 40s.
Problem is, I think I'd accept all this if the child were a girl. Don't really know why precisely that is (but it is certainly more to do with bringing a girl up like the boys than wanting some silly Daddy's doll)
Thought the same before DS2 was born, but have loved him being around, but effects on other two are so much greater than effect on DS1.
So unreasonable sexism, or not?

Lots of people feel the same way. So I guess that's a yanbu.

Not unreasonable. For all the reasons you've given.

I think the other concerns like money, house and time for the boys are a better reason for not having another baby.

I feel similar, except that I would so like a boy, to the extent that I'm not sure I could feel as strongly about a daughter.

I don't think you're being sexist - just honest. A lot of people have a serious preference when it comes to the sex of a potential child. Some are brave enough to voice it - others not.

As for the sacrifices you'd have to make - they're big ones. I'm not sure that I could make them and we will stop at two kids for some of the reasons you mention - not least the thought of a point in the future when we can expect to regain some of our freedom and independence, and see an end to the crippling expenses.

i think you're being very sensible actually!!

YANBU, I understand what you mean. I have one DD and don't want to have any more children, but if someone could guarantee me a straight forward pregnancy/birth and a baby boy at the end of it who will sleep through every night I might be convinced to have another.

Your preference may well have been for a boy if you'd had 2 girls so I dont even think its sexist, I think a lot of people have a desire to experience parenting both flavours and to experience any differences in the family dynamic they bring...

YANBU

I think anyone who only wants a child of a particular sex shouldn't have one at all.

Agree totally with Juneo.

You are just being honest enough to admit what many people don't.

People have children for all sorts of reasons which aren't noble.... to try to save a failing relationship, to avoid moving forward with the next phase of their life.... you have recognised that there are many reasons against you having more children and are honest enough to say so.

"I think anyone who only wants a child of a particular sex shouldn't have one at all." - in other words you are agreeing with the op, Florence. So thats another yanbu.