For what reasons will a girl not get her monthly period?

* Pregnancy. If a woman is pregnant, she will not get her period. This is because the hormones that support pregnancy prevent the shedding of the uterine lining, which is what causes a period.

* Breastfeeding. Breastfeeding can also cause a woman to stop getting her period. This is because the hormone prolactin, which is produced during breastfeeding, can suppress ovulation.

* Birth control. Some types of birth control, such as birth control pills, can cause a woman to stop getting her period. This is because these medications prevent the ovaries from releasing eggs, which is necessary for a period to occur.

* Menopause. Menopause is the natural process by which a woman's ovaries stop producing eggs. This usually happens between the ages of 45 and 55. When a woman enters menopause, she will stop getting her period.

* Other medical conditions. Certain medical conditions, such as thyroid problems, diabetes, and Cushing's syndrome, can cause a woman to stop getting her period. These conditions can disrupt the normal hormonal balance that is necessary for ovulation and menstruation to occur.

If you are a woman and you have not gotten your period for three months or more, it is important to see a doctor to determine the cause. This is especially important if you are not pregnant or breastfeeding.