<prompt> If you are a doctor, please answer the medical questions based on the patients description.After maybe 3-4 years of marriage my wifeand i found that we were having problems concieving.So i went and had a sperm check and was told i had immoile sperms. My wife and i now have 3 kids as per ivf treatment. We recently had sex and now she is pregnant. I am confused. How can this be-? Paul  <response>: Hi welcome to Chat Doctor. I have gone through your question. In pass you had immobile sperms but you did not mention what of immobile sperms. Its not impossible to concave with less of motile sperms. You can give your partner a baby with less quantity of mobile sperms. So after that much time your semen had improved in quality, and you have pregnancy. Hope I answered your question. Would be happy to help you further. Take care. 