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Signs of ovulation devices

During this phase, the sperm’s survival rate is higher, it can survive in cervical mucous for up to 72 hours, a significantly longer time than during the rest of the cycle. The last day of this period where the chance of conception is high, it is closely tied to signs of ovulation. It is often only recognized in rertrospect.
There are also devices that detect the numerous salts (chloride, sodium, potassium) in a woman’s sweat, which change during different times of the month. Called the chloride ion surge, this shift happens even before the estrogen and the LH surge, so these tests give a woman a four-day warning of when she may be ovulating, versus the 12-to-24-hour one that the standard pee-on-a-stick OPKs provide.

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