The Menstrual Cycle

The menstrual cycle and Natural Cycles

Natural Cycles uses women's unique basal body temperature (BBT) readings and LH test results (optional) to pinpoint where a woman is in her monthly cycle - i.e. time of menstruation, ovulation, when she is like...

The fertile days (fertile window)

Your fertile days / the fertile window is the 6 day period in which a women can get pregnant from having unprotected sexual intercourse. The fertile window is determined by the sperm survival of 5 days and the ...

Anovulatory Cycles

Anovulatory cycles, cycles without ovulation is generally nothing to worry about, as it’s quite common that they occur sometime during a woman’s fertile years. About 5% of all our Cycler’s cycles are anovulator...

Using Natural Cycles when you have irregular cycles

Natural Cycles accurately captures every woman's unique cycle patterns by taking cycle irregularity, temperature fluctuations, recent usage of hormonal contraception, ovulation day variation, sperm survival and...

Does Natural Cycles take sperm survival into account?

Of course! In order to work effectively at finding your fertile and non-fertile days, Natural Cycles needs to take sperm survival into account. It is well known that sperm can survive up to 5 days in the femal...

How will Natural Cycles work for you with PCOS?

What is PCOS? PCOS makes the ovaries more androgens than normal (poly=many), which affects the development and release of eggs during ovulation. Therefore women with PCOS often experience anovulatory cycles ...

Using Natural Cycles with Endometriosis

What is endometriosis? Your endometrium is the lining of blood that builds up on the uterine walls every cycle due to your body's natural hormonal changes. If no egg implants into the endometrium, it will brea...