When would we need to stop having in order to conceive a girl?

If you want to try for a girl you would need to have an acurat time frame of when you will ovulate and have before you ovulate. So you would need to chart your basil temps and used ovulation strips for 1-3months. Female sperm live longer then male sperm, but they are slower so it may take several hours or even a day for them to reach the egg.Therefore you would need to have before you ovulate, then if you are truely set on a girl, you should not have during ovulation time. Male sperm s fast but they die quickly, so you would want to try for a boy the day you are ovulating or afterwards. For more info read the book "Taking Charge of your fertility," it explains everything. It is an awsome book. Try your local liberary if you do not want to buy it.