I tried this but I was already about 15 weeks, it turned dark purplish-blue but was that to late in the pregnancy??? I also did the baking soda test at about 12-13 weeks and it didn't foam.
I don't think it was probably too late...they just say 10 weeks is the best time to do it. It's probably correct but I would think if you were having a boy that the acidity would be high by 15 weeks, showing boy results. I also did the baking soda test about the same time you did and I got the same results. And like I said, mine is a girl. (confirmed 6 times already...lol I'm paranoid.) So, I'm guessing from the cabbage test, the baking soda test, and your ultrasound pic...that it's a girl. :) And I know how much you are hoping for one. How far along are you now?