Romans 8:14-17 "4For those who are led by the Spirit of God are the children of God. 15The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. And by him we cry, “Abba, Father.” 16The Spirit himself testifies with our spirit that we are God’s children. 17Now if we are children, then we are heirs—heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory." So no, it doesn't mean we're all girls and no. It doesn't say we're "ALL" children. If you read it a little you would understand a little.