How many opk do u take in a cycle and when do you start?

Cassie • Momma of Two Graci 5-7-15 Graeson 9-7-16! Angel Momma of Two Nov 2015 and Twin B Jan 19 2016! Single Momma! TTC baby 3 via Sperm Donor! :) ❤️💜
Ive only been taking like two around CD 12 and 13 soo