Will I have a boy baby and when

i m a 24 yr mother of a 1 year girl ,will I conceive a boy second time

Not necessarily. Some families do all girls, some so all boys and some are a mix. The web site below predicts the odds of having a boy after having 1 girl at 54.5%. Not much difference than the flip of a coin.

http://www.in-gender.com/XYU/Odds/Gender_Odds.aspx

There's no way to predict. It depends on if you egg is fertilized by a x- or y-sperm.

There are places that can help you conceive the child of your choice in California and New York. It costs around $20,000. Give or take some. It's expensive, and some people don't like the idea almost like its playing god, or making a super baby. But it's your egg and mans sperm, I say do what you want! Also type in "how to have a boy" on google when you are trying to conceive again. It can give you diets and positions that supposedly will help you conceive the sex you want. I have two boys, so now I want a girl. I'll cross my fingers for you!