Has anyone used any gender prediction tests? What are your thoughts on them? If you have used them before, how far along were you and what brand did you use? I'm 4w2d with our Rainbow Baby, and we are curious what people think of these tests. We will be very happy whether boy or girl, just hope (s)he sticks and is healthy, but we are REALLY hoping for a girl, since we already have 4 boys (ages 9, 6, 6, and 4).