[mapletree]

Bro, this is not just theory but from my own experience....

"Unsafe" part is +/- 4 days from Ovulation...
Let me put it simply this way. This will only work if your partner is healthy and having regular periods (every 28-30 days).

I assume your partner has healthy cycles. So will assume it is 28-30 is one cycle.

Start of period is D1.
Ovulation happens at the centre point. That is 14th or 15th.
Women are more sexually aggressive at this period, its a natural process.
Sperms can survive in women for 3 days.
Once egg is released, its 'best fertile' duration is around 6 hrs and after 12 hrs it will be coming out if not conceived. Usually at the center of cycle, women get this brownish/whitish discharge is this un conceived egg.

So if we take 4 days +/-, you get from 10th day to 18th day.

If you don't want to get her pregnant, avoid from 10th to 18th days.
If you are planning a baby, best is 12 - 16th.

Always add an extra day for safe side as the cycle could drift a little depending on some current conditions.


I am not just saying this from theory. I studied to be a doc but ended up being in IT. But I used this theory from pre marriage untill we really planned a baby.
Almost 12 years of safe sex without any condoms. Only used condoms when she has higher urgencies, specially around ovulation.

Never ever try or think pulling before shoot is safe.

Avoid those days I mentioned. Also don't have sex during periods because its not pleasant for both.

Have an enjoyable sex life...

No offence for any other bro's ideas. I just shared my own experienced natural contraceptive being used for almost 12 years now.

Cheers!!