Critical period

Critical period indicates the period that could not clearly be marked as infertile* by PERIMON, whereas the count start with 1.0 at the beginning of the cycle (as it is done traditionally because it is the first day of the new cycle).
“Of” marks the end of the cycle and is (according to standard count) always one number greater than the actual cycle length.
*) Information about fertility in accordance with our Opens new window disclaimer: Please take into account that this information might be incorrect as contraception is never Opens new window 100% safe
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