How to calculate ovulation period if menstruation is irregular

Patient's question:

Irregular menstruation, how to calculate ovulation period?

Doctor's answer:

If your menstrual cycle has always been very regular, generally, your ovulation period is around 14 days before your next menstrual period. If your menstruation is not very regular, you can determine your ovulation period by measuring your basal body temperature. The specific method is: when you wake up in the morning, do not get out of bed or move your body. First, measure your temperature with a thermometer. Generally, before and after ovulation, your temperature will show a small fluctuation, dropping and then rising, with a fluctuation range of more than 0.3°C. This is when ovulation occurs.

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