Amenorrhea - is characterized by the absence of menstrual period - it may be physiological in pregnancy, lactation or menopause and pathological primary when menstruation occurred after age 18 years or secondary pathological when it appears after the normal menstrual cycle and lasts longer than 2 to 3 months - pathological secondary amenorrhea may be temporary or permanent - pathological amenorrhea may be due to chronic diseases, endocrine, some nerve disorders, genital infections, trauma, psychosis, malformations;

Primary amenorrhea refers to the absence of menstruation after the age of 16 years, in conditions where there was still no cycle. One can speak of secondary amenorrhea in women when menstrual cycle or until a more regular stop for more than three months, without being about pregnancy, lactation, relatively recent withdrawal from birth control pills, did not have any serious problem of nature nor affective recently changed the living environment. Abnormal menstrual cycle is any uterine bleeding that is different from the usual bleeding, the clinic, and the time of menstruation.

The causes may be: genital or systemic diseases, endocrine disorders functional or organic disease, benign or malignant. It is considered that any women in fertility have at least 1 to 2 episodes of abnormal bleeding. Bleeding can ill anemia, complication that caused discomfort very presence of bleeding.

There are several types of bleeding:
Hipermenorrea: - is excessive menstrual bleeding clinic flow;
- Local causes may be organic, endometrial hyperplasia
- Hipermenorrea is the situation when continuous uterine bleeding menstruation;

Polymenorrhea: - is characterized by short cycles of 17 to 21 days, abundant menstruation;
- Cause is endocrine or systemic;
- Polymenorrhea within pre-ovulatory phase is shortened;
-Type of abnormal uterine bleeding

Hypomenorrhea: - is a menstrual disorder characterized by reduced menstrual flow, in 3 days;
- Disorder can sometimes be represented by a simple spot of blood on linen;
- Cases may be local, systemic or endocrine disease: genital inflammatory diseases, acute or chronic general diseases, neuropsychiatric disorders, poisoning, and TB endometrial Uterine synechiae;

Oligomenorrhea: - is a menstrual disorder characterized by menstrual bleeding that occurs in more than 35 days and irregular;
- When the time is over 6 months, then it is amenorrhea;
- Cause is endocrine or systemic;
- Is possible absence of ovulation?
- Bleeding can be decreased quantity and the duration or quantity may be increased;

Metrorrhagia - Uterine bleeding is normal menstrual bleeding that occurs between successive
- Quantitatively, can vary from a few drops to a moderate amount or abundance;

Premature menopause is installed under the age of 40 years.
- Below average body weight is also one of the most common causes of loss of menstruation in full a woman's fertile period. When your body is not enough food, especially in cases of anemia, can cause a pregnancy to end.
Other causes are obesity or excesses in the practice of gymnastics. The doctor will try to find out if he has to do with a gland dysfunction or a polycystic ovary.
 - Secondary amenorrhea time of differentiation of the primary
- Pathological final, installed at least one year, confirm with a probability of 90% installation period of menopause may be due to secondary and pathological causes that prompted surgery on their ovaries or radiation.
- Amenorrhea can lead to osteoporosis (thinning bones). To test whether hormonal or suffering from disorders of the ovaries or gland growth wren, are necessary blood tests and ultrasound tests. Hormone treatments can cause return menstruation, but if the origin of the disease are very low body weight, stress, too much exercise, then the simple solution of these problems will lead to normalization cycle.