Baby Girl Video 1st product - Version 1.0 There are few sex positions to conceive baby girl. This is based on different characteristics of a boy and a girl sperm.A boy sperm is weaker than a girl sperm. This difference can be utilized when choosing the best sex positions to conceive baby girl. The best ones are those that do not require a deep penetration. The reason for this is that, because sperm need to travel a rather long distance to the cervix boy sperm is more likely to die during that time than girl sperm. Let's talk about some best positions that help you to get pregnant with a girl.