Please tell me, could a girl know when her period comes?

First Period: Menarche usually occurs between ages 11 ; 13 in the us. However for some their period could start as early as age 9 ; for others not until 16. Before you have a period, you will have noticed breast development, pubic hair ; white to yellowish vaginal discharge. Before the first period a girl may feel bloated, develop cramps in legs or abdomen ; feel moody (depressed or anxious).

Some will: Some women are so regular they can plot the event on a calendar for the year.Some are irregular and must rely on the premenstrual symptoms they learn to identify.