You cannot make your period start on demand
If you have not started periods yet, they usually begin naturally during puberty
Eat enough food and maintain a healthy body weight
Avoid extreme dieting or excessive exercise
Manage stress and get enough sleep
If your periods are late or absent, take a pregnancy test if pregnancy is possible
See a healthcare professional if you have not started periods by age 15
See a healthcare professional if periods stop for 3 months or more after they have started
See a healthcare professional if you have severe pain, very heavy bleeding, or other concerning symptoms