► Making use of disposable napkins or tampons may reduce chances of infection.
► Girls should realize that menstruation is as natural as any regular physiological activities.
► Girls are advised to use sanitary napkins or tampons rather than cloth. It should be changed frequently depending upon the menstrual flow. If a cloth is being used repeatedly, it should be cleaned with soap and hot water and dried in sunlight for reuse.

After ovulation the ovum reaches the fallopian tube and fertilization takes place. The fertilized egg undergoes development and it is implanted in the uterus. The corpus luteum continues to grow and produces large amount of progesterone. This results in pregnancy. Normally it lasts for 280 days, at the end of which parturition takes place.

The first menstrual flow begins at puberty and is termed menarche. The ova begin to mature with the onset of puberty.

Secondary Sex characteristics are the physical features which distinguish male from female
Example:- Voice - In Male - husky voice. 
In Female - shrill voice.

Adolescence is the period of reproductive maturity which lies usually between the ages of 11 to 19 Years.

To keep the body healthy, every adolescent needs to have a healthy diet, exercise and hygiene.
Healthy diet:
Adolescence is a stage of rapid growth and development. Hence a diet with proper calories and other nutrients is needed for proper growth and physical activity. A balanced diet is required which includes proteins, carbohydrates, fats and vitamins in requisite proportions. Apart from this, the body needs calcium, phosphorus, iodine and iron because there is an increase in skeletal mass and blood volume during adolescence.
Physical exercise:
Walking, playing outdoor games and doing exercise keep the body fit and healthy. It leads to mental peace.
Hygiene: 
i) Have a bathrobe or twice a day, paying special attention to underarms, groins and genitals.
ii) Change the underwear daily. It should be made of cotton and washed and cleaned everyday.
iii) For adolescents, the increased activity of sweat glands sometimes enhances body odor. If cleanliness is not maintained there are chances of having fungal, bacterial and other infections.

(i) When a girl reaches puberty at the age of about 10, the sex hormones released into her blood cause some of the ova in her ovaries to become mature.
(ii) Usually one mature ovum is released from one of the ovaries into the oviduct once in every 28 days. This is called ovulation
(iii) Before ovulation the inner wall of uterus becomes thick and spongy, and full of tiny blood vessels. It prepares itself to receive the fertilized ovum.
(iv) If the ovum does not get fertilized then the thick and soft inner lining of uterus is no longer needed and hence it breaks. So the thick and soft inner lining of uterus along with the blood vessels and the dead ovum comes out of the vagina in the forrn of a bleeding called menstruation.
(v) Menstruation usually occurs 14 days after ovulation and usually lasts for about 3 to 5 days.
(vi) After menstruation is over, the inner lining of the uterus starts building up again so that it may become ready to receive the next ovum.
(vii) If the ovum does not get fertilized even now then menstruation takes place again. This cycle of menstruation is repeated again and again in women after every 28 days. The menstrual cycle is controlled by hormones.

During adolescence, there will be
(i) Changes in body size
(ii) Changes in body proportion
(iii) Development of primary sex characteristics
(iv) Development of secondary sex characteristics
Secondary sex characteristics are the physical feature which distinguishes male from female.