Women living in close proximity always end up on the same monthly cycle.

In order to be complete, this calendar only needs the presence of the monthly cycle.

They said, okay, this will not wait for our standard monthly cycle.

If you take monthly cycles of birth control hormones for a long time, your periods might stop.

A: There's about a 20% chance that you'll get pregnant during any given monthly cycle.

Can you get pregnant any time in your monthly cycle?

There are many leagues running on approximately two monthly cycles.

About 8% to 20% of women get moderate to severe symptoms a week or two before their monthly cycle begins.

I now in complete charge of your bodies - including monthly cycle.

A woman usually produces one egg in each monthly cycle.