When is a woman in her safe period

Patient's question:

No

Doctor's answer:

The calculation method for the safe period is as follows: The 14th day before the expected next menstrual period can be considered as the ovulation day. The period of 5 days before this day to 4 days after this day is considered as the fertile period. During this time, sexual intercourse should be avoided, which is the method of safe period contraception.