If the urine is separating, its probably because of your diet, or how concentrated your urine is at the time. A hormone would not effect the density of urine. I'm not saying that your urine did not sink to the bottom of the toilet, I'm just saying it wasn't because of the hcg in it. Plus, the Hcg doesn't make your urine yellow...the more yellow your urine is the more concentrated it is, but those are the wastes your body is flushing out, not the hcg.