What have 3.9 billion women gone through to achieve "menstrual freedom"?

In addition to sanitary napkins, modern women's menstrual products also include menstrual cups and tampons, which were invented at a similar time to sanitary napkins. In 1937, actress Leona Chalmers invented the first menstrual cup using latex. The first tampon was invented by American doctor Earl Haas in 1929. She compressed cotton wool into two cardboard tubes and invented the modern tampon. This invention was patented in 1933 and went on sale in 1936. It was once regarded as a symbol of women's liberation. When the first American female astronaut entered space in 1983, the menstrual product she carried was a tampon.

Due to the lack of sufficient understanding of menstruation, many people have deep-rooted prejudices even in adulthood. Many people regard women's normal physiological needs as hypocritical and squeamish... Overcoming menstrual shame is not only the matter of the person concerned, but it is also important to popularize relevant physiological hygiene knowledge to people who are not troubled by menstruation! Schools and parents should carry out health education scientifically and reasonably to break this seemingly mysterious taboo, which is the first step to break the shame of menstruation.