Okay, here is an article with the title "When is the ovulation period when menstruation starts on the 6th?":

Calculating ovulation is a common problem for many women. If you have your period on the 6th, when should you ovulate? Below we will introduce you to several methods of calculating ovulation.

First, you can use the basal body temperature method to calculate ovulation. Basal body temperature is when your body temperature is measured when you wake up. If your basal body temperature rises by 0.3 to 0.5 degrees Celsius, you may be ovulating around this time next month.

Second, you can use the calendar method to calculate ovulation. The calendar method means recording your cycle and date according to the date of your period, and calculating your ovulation period. This method requires you to remember your menstrual dates and cycles and stick to the schedule.

Third, you can use the body temperature method to calculate ovulation. Thermometry means measuring your body temperature and recording changes in it. If your body temperature rises by 0.3 to 0.5 degrees Celsius at this time of month, you may be ovulating around that time.

To sum up, there are many ways to calculate ovulation, and you can choose the method that suits you according to your own situation. No matter which method you use, you need to strictly follow the plan to ensure your health and safety.