Because your menstrual cycle is the lining of your uterus shedding.
oestrogen and progesterone
If you are a female then you are always in your menstrual cycle. The term 'menstrual cycle' is another word for the reproductive cycle, women are essentially always within this cycle - although it can be thrown off-balance, when a woman is pregnant, or suspended by hormonal birth control.
Rwanda
Yes, gas pains and bloating are the 2 most common side effects of the menstrual cycle. This can happen in both older women and younger women.
The typical menstrual cycle is 28 days, thus a new cycle will start every 28 days. Everyone is different so will have a different menstrual cycle length, also some variation from one cycle to the next is normal.
The contraceptive implant prevents the normal menstrual cycle. Some women have irregular bleeding, and others have no bleeding at all.
The menstrual cycle is the entire reproductive cycle - I think you mean during menstruation.Yes, a woman can practice yoga during menstruation, in fact some poses can be very beneficial to menstrual health and ease menstrual cramps.
No, not every woman has a menstrual cycle. Most healthy adult cis-women will menstruate, however women who have reached menopause will no longer have a menstrual cycle, nor will women who have had a hysterectomy - basically women who are no longer fertile. Women who use hormonal birth control don't have a menstrual cycle, as the purpose of hormonal birth control is to suppress the menstrual cycle so they don't ovulate - the bleeding women get is a withdrawal bleed, it mimics menstruation but isn't the same as menstruation. Many women were born biologically male, thus regardless of changes to their gender or genital reassignment surgery to change their sex, they are not capable of ovulation and thus don't have a menstrual cycle - although interestingly hormones given to many transsexual women can create symptoms similar to that of the menstrual cycle.
Yes, they often do.
No - the menstrual cycle is the entire reproductive cycle that women experience all the time, if you are asking specifically about menstruation then that can start during the day or overnight.
No. Only women can menstruate, because men, by definition, do not have the required equipment.Men can be influenced by the female menstrual cycle, because women release hormones during their cycles, and men respond to them subconsciously.