This from a CNN story:

If Americans could have only one child, they would prefer that it be a boy rather than a girl, by a 40% to 28% margin, with the rest having no preference or no opinion on the matter. These attitudes are remarkably similar to what Gallup measured in 1941, when Americans preferred a boy to a girl by a 38% to 24% margin.

The attitudes of American men drive the overall preference for a boy; in the current poll, conducted June 9-12, men favor a boy over a girl by a 49% to 22% margin. American women do not have a proportionate preference for girls. Instead, women show essentially no preference either way: 31% say they would prefer a boy and 33% would prefer a girl.

and to make it even worse

It is significant that 18- to 29-year-old Americans are the most likely of any age group to express a preference for a boy because most babies are born to younger adults.

People always used to ask my Dad (the father of three daughters) if he regretted not having a son. His succinct response was "no"--and he used to get so angry that people would even think to ask him that. His response and the love behind it has made a difference for all of my life. Thanks Dad.