This is true -- though during the period is one of the least likely times to be ovulating, too. That's why the "day one" start, where the first day of HBC is on the first day of the period, gives "immediate" protection: the 7 days to hypnotize the ovaries overlaps with days when the ovaries are known to be extremely unlikely to ovulate.
(As opposed to the after-ovulation days, which are often hard to pinpoint if not practicing FAM.)
It's the "early ovulation" + "sperm lifetime longer than people may realize" that makes period sex risky.
Please forgive typos/terseness -- the cat is trying to occupy my laptop. And he outweighs it.
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Date: 2012-02-22 05:49 pm (UTC)(As opposed to the after-ovulation days, which are often hard to pinpoint if not practicing FAM.)
It's the "early ovulation" + "sperm lifetime longer than people may realize" that makes period sex risky.
Please forgive typos/terseness -- the cat is trying to occupy my laptop. And he outweighs it.