A woman's menstrual periods are regular and usually lighter when she is taking oral contraceptives
When you menstruate is determined by your menstrual cycle, a hormonal domino affect between your brain and reproductive organs. The idea that womens menstrual cycle synchronize is a myth, one womans menstrual cycle cannot change another womans menstrual cycles.
The first day of a womans menstrual cycle is also the first day of menstruation.
Yes, a womans cycle is calculated from the first day of her period
The first day of a womans menstrual period is just that - the first day of menstruation.
A young lady's menstrual cycle is called a period.
83% of men.
It can.
Inside is red, due to the womans periods once a month
It sometimes affects a womans libido.
Condoms, spermicides, copper IUDs, diaphragms, cervical caps, vaginal sponges, spermicides, withdrawal, and calendar planning are all hormone free.
Clarification needed: do you mean eating it, drinking it, or...?
No.