When is ovulation? How to use soda water

Patient's question:

Sure, here is the translation of the content you provided:
No

Doctor's answer:

The date of ovulation is generally about 14 days before the next menstrual period. Starting from the first day of the next menstrual period, count backwards 14 days or subtract 14 days to find the ovulation day. The ovulation day, along with the 5 days before it and the 4 days after it, together constitute the ovulation period.