Conversation: The conversation between human and AI assistant.
[|Human|] My fertility doctor said I have a stenotised cervix and I cant get pregnant on my own. I m not a doctor but I can help but doubt what she tells me. I have a regular 25 day period and I m just wondering how does blood get out and on time EVERY month and sperm cant get it???
[|AI|]  Hallow Dear, Tight cervix is one of the factor of failure of conception. You have to find out how tight is the cervix. Very tight cervix will cause intolerable pain during your menstruation. Your question is very valid that if your menstrual discharge can come out how is it that sperms cannot go in. My dear, during the menstruation, the uterus is contracting and pushing the lining and the blood out when the cervix will open; while there is no such force for the sperms to get pushed inside the uterine cavity. The sperms swim their own way through the cervix towards the egg. However, if too much uterine force is required to open the cervix, it will cause considerable pain in lower abdomen and low backache. Maybe the inner lining of the cervix is not conducive for the sperms. This is called as cervical factor which (empirically thought) gets corrected after dilatation of the cervix. To have the clarification on your doubt, you may undergo Ultrasonography in which the diameter of the cervical canal and the inner opening can be measured. I hope this clarifies your doubts. If you want to have further more discussion on this issue, you may ask me Direct Question.