There is no scientific basis for the claim that women are most likely to get vaginitis when they have miscarriages. However, women are more prone to vaginitis when they have an abortion, have unclean sex and have a lowered resistance. 1. Abortion: If the abortion is incomplete during the abortion process, it will lead to irregular vaginal bleeding and cause vaginitis. 2. Unclean sex: During sex, male genital organs carry bacteria, or male foreskin is too long, foreskin dirt is deposited in the foreskin, which enters female vagina through sex, leading to female vaginitis. 3. Decline in resistance: For example, during upper respiratory tract infection or menstruation, resistance drops, when the resistance of the reproductive system is very weak, once the bacteria invade, it is easy to cause vaginitis. Therefore, women must usually keep local hygiene, enhance resistance, to avoid vaginitis caused by the above factors.