Nine-valent generally refers to the nine-valent human papillomavirus vaccine, and delayed menstruation does not usually occur after receiving this vaccine. Nine-valent HPV vaccine is generally indicated for the prevention of diseases caused by the HPV types contained in this product, such as cervical intraepithelial neoplasia grade 2/3, adenocarcinoma in situ of the uterine cervix, and cervical intraepithelial neoplasia grade 1, etc. The vaccination will not affect the normal menstrual cycle, but adverse reactions such as headache, swelling at the site of inoculation, cellulitis, and hypersensitivity reactions may occur. Nine-valent HPV vaccine is suitable for the preventive vaccination of women aged 16-26 years. It is prohibited for patients who are allergic to this product or quadrivalent HPV vaccine, or who have symptoms of hypersensitivity reaction after injection of this product or quadrivalent HPV vaccine, and it is recommended to go to regular medical institutions for vaccination.