Generally it is safe to have sexual intercourse at any time other than when a woman is fertile, ovulating, as long as that time does not coincide with her fertile lunar phase. So you really need to know when you have fertile mucus and when your natal lunar return occurs.
A week before and a week after the approximate day of ovulation is considered to be Fertile period.
The days apart from this is called the safe periods, where the fertilization does not takes place.
So, to calculate the safe period you must know the fertile period.
Calculation of fertile period: The shortest cycle minus 18 days=1st day of fertile period. The longest cycle minus 10 days= last day of fertile period.
Example: if a women's menstrual cycle varies from 26days to 31days cycle,
The shortest cycle [26days] minus18days=8th day.
The longest cycle [31days] minus 10days=21st day.
Thus, 8th to 21st day of each cycle counting from first day of menstrual period is considered as fertile period.
Period other than this fertile period in a menstrual cycle is considered as SAFE PERIOD
Answered by
Armaan
, an ibibo Citizen,
at
6:13 PM on August 31, 2007