Question: how many days after my period should i start ovulation testing?
Answer: So, for example, if you have a 28-day cycle, this will be about day 14. If you have a 35-day cycle, it will be about day 21. Use our ovulation calculator to help you work out when you're likely to ovulate. Start using the OPK three to five days before you're likely to ovulate, or when the instructions advise you to.