Opk test for PCOS

Kriteshna • #baby no. 1, 28 married💍 with ❤️ ➕ PCOS

I am currently taking letrozole and femara. It is my second cycle with the above medicines. I wanted to try using opk's this cycle so want to know from which cycle day should I start testing. Plz🙏 help I just want by baby no. 1