The vaginal diaphragm should only be used if uterine prolapse, rectal distention, bladder distention, vaginitis and severe cervicitis are excluded. The vaginal diaphragm should first be selected with the appropriate number under the guidance of a professional. The user is placed in a semi-recumbent, semi-squatting or semi-sitting position with the legs slightly apart, the labia majora separated with one hand, and the thumb and middle finger of the other hand pinch the diaphragm into an oval shape with the convex side facing the cervix, feed it along the posterior wall of the vagina and upward to the top of the posterior vault, then nestle the anterior edge of the diaphragm in the anterior vault, and finally probe the cervix to see if it is covered. To remove, the right index finger or middle finger is used to reach into the vagina and hook the anterior edge of the diaphragm spring ring above the pubic symphysis and pull it outward. It is usually placed before intercourse and removed 8 to 12 hours after intercourse. If removed too early, sperm that are still active may enter the uterine cavity and lead to contraceptive failure. It should not be left in place for more than 24 hours to avoid damage to the vaginal wall. After removal, the diaphragm should be washed and dried, rubbed with talcum powder and set aside. When it is time for a woman to remove the diaphragm, she can reach into the vagina with her fingers, hook the front edge of the spring ring under the pubic arch, and pull it slowly downward and outward. After removal, wash and dry with water and soft soap, apply a non-irritating powder and place in a clean, dry box or wrap in a small, clean towel for next time. Generally, a vaginal diaphragm can be used repeatedly for two years. The diaphragm should not come into contact with oil-based substances (such as petroleum jelly) that could damage the latex membrane. Cautions Although the vaginal diaphragm is an amazing method of birth control, it is not suitable for some women. 1. If a woman has inflammatory diseases of the reproductive organs such as vaginitis or severe cervical erosion, it is not suitable. 2. If a woman has a prolapsed uterus, a tight vagina, or a loose vaginal wall, it is not suitable. 3. If a woman has habitual constipation, it will affect the correct placement of the vaginal diaphragm and should not be used. In addition, it is not recommended for women who are allergic to rubber and for women who cannot properly master the technique of vaginal diaphragm placement.