Scanty periods are periods which are lighter than normal. The condition is also called as Hypomenorrhea which occurs after puberty or just before menopause. Less bleeding during menses can be due to hormonal contraception methods, like oral contraceptive pills and IUDs which releases hormones like Mirena.
Many women have scanty periods and these are kind of light periods with less blood flow during menses. There are different reasons which cause scanty periods in women. Some of them include use of birth control methods and hormonal imbalances.