Why does semen reflux?

Patient's question:

I always feel that semen leaks out after having sex with my husband, and it's the same even when I prop my hips up. What should I do? I want to get pregnant as soon as possible—is there any method for that?
Follow-up question: But after I wake up in the morning, my lower body is still wet. Is it possible that the semen didn’t go in?

Doctor's answer:

Hello, what you're referring to should be semen refluxing rather than ejaculation, which is called anejaculation. The occurrence of this phenomenon can be broadly categorized into two aspects: physiological factors and pathological factors. Physiological factors primarily refer to excessive sexual activity, which can overload the central nervous system responsible for ejaculation, making it unable to effectively issue the command for ejaculation, thus leading to anejaculation. Additionally, poor sexual quality, a lack of strong sexual arousal in the male, or psychological factors such as fear of pregnancy, fear of causing pain to the partner during intercourse, concerns about sexual dysfunction, or worries about the partner's dissatisfaction with sex—all these adverse stimuli can affect various aspects of sexual activity through the brain, also resulting in anejaculation. Pathological factors mainly refer to certain abnormalities in the nervous, reproductive, and endocrine systems. For example, lesions in the brain or spinal cord can hinder the normal functioning of ejaculation; abnormalities in the hypothalamus, pituitary gland, or testes can affect the regulation of sexual hormones.

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