Sanitary napkins are sanitary products used by women during menstruation. Its main material is high polymer and high polymer composite paper formed by cotton, non-woven fabric, paper pulp or the combination of the above materials. The side edge is mainly designed to prevent side leakage, and it is divided into three layers from inside to outside: surface layer, absorbent core and bottom layer. When using, first tear off the paper tape in the middle.
First, stick the rubber side in the middle of the underwear, and then stick the two "ears" in the narrowest part of the crotch. Other common menstrual products include tampons, menstrual cups and menstrual pads. When choosing sanitary napkins, we should pay attention to the material composition, hygiene standards and our own actual situation.
1 is a physiological cycle that occurs between some fertile female humans and chimpanzees and other animals.
2. For women of childbearing age and primate females, every other month or so, the endometrium has an autonomous thickening, vascular proliferation, gland growth and secretion, and periodic changes of endometrial collapse and shedding accompanied by bleeding. This periodic vaginal bleeding or uterine bleeding is called menstruation, and the blood flowing out during menstruation is also called menstrual blood.
3, menstruation has many common names, such as bad things, period, menstruation, good things, bad luck and so on. The average age of menarche in modern women is 12.5 years old. The menopausal age is generally between 45 and 55 years old, which is related to the aging of ovulation function and the decrease of estrogen secretion.