​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Opks might not work for everyone for detecting HCG but they sure do for me. They picked it up before hpts did. The top is the opk.