When is ovulation if menstruation is delayed by three or four days?

Patient's question:

No

Doctor's answer:

Cervical mucus method: In the gynecology department of the hospital, it determines whether you are in the ovulation period by examining cervical mucus.
Second is the basal body temperature method: Measure your temperature every morning after waking up. Generally, your temperature is lower in the first half of your menstrual period, even lower during ovulation, and then gradually rises after ovulation.