Opk brand comparison with hCG present

On Monday my hCG was at 69. It looks like the wondfo brand is definitely picking up on my hCG, but the other brand is not! Which is good because I hated not being able to use opks. Looks like the pink brand uses a different method of detection. (Colloidal Gold Method?)

Anyway, if you still have hCG floating around from mc, but want to use opks again, try out different brands and see which ones pick up on it and which ones don’t.

Anyone else have an opk brand that they have found to work after mc with all that hCG still around?