Any ideas on conceiving a girl

Jessica • Just me and my three my husband my baby girl Jurnee and my prince Shiloh.
Me and my husband are working on our second child together and third child for me all together. I have a daughter and we had a son before we got married together. So right now I would really love to try for a girl. I have heard that certain positions and even times of fertile window can determine if you want a girl or boy. Does anyone know?