Will I get pregnant if I have sex before my period is completely gone?

Patient's question:

Your girlfriend's menstrual period has not completely stopped yet. We had sex, and she released inside. Last night, there was some bloody discharge, and there was also bloody discharge the next day. By the third day, it was clean. Will she get pregnant?

Doctor's answer:

No
During this special period, a woman's vaginal defense ability is significantly weakened. For the health of women, it is recommended not to engage in sexual activity during this time. Hospitals often have patients who develop acute pelvic inflammatory due to sexual activity during this period.
Guidance:
The main potential issues of having sex during menstruation:
1. Changes in the pH level of the female vagina, combined with the nutrients in menstrual blood, make it easy for microorganisms to multiply.
2. Changes in the viscosity of cervical mucus during menstruation make it easier for microorganisms to enter the uterus.
3. The endometrium during menstruation has wounds, making it more susceptible to infection.
4. Excitement during sexual activity can cause uterine contractions, which may increase bleeding or cause pain.