Patient's question:
Here is the translation of your text into English, with the line breaks preserved as instructed:This month, three days before my period, we had sex. Later, I got my period, and the flow was particularly heavy. What could be the reason?
Doctor's answer:
During menstruation, if sexual intercourse occurs, the menstrual secretions of the female enter the male urethra, which may cause urethral irritation in men. Sexual activity during menstruation may lead to infertility. As sperm encounters blood cells at the site of endometrial damage or leakage, it may even enter the bloodstream. This can trigger an allergic reaction in immune cells during the period, stimulating the body to produce antisperm antibodies. These antibodies can be present in the female cervical mucus and serum. When these antibodies come into contact with sperm again, they can trigger an immune rejection response, thereby affecting fertilization.Women often experience low libido during menstruation, and they already have discomfort symptoms during this time. Engaging in sexual intercourse under these circumstances can worsen the discomfort. Additionally, sexual activity during menstruation may make the male feel embarrassed.