Source:http://linkedlifedata.com/resource/umls/id/C0021364
MSH: The inability of the male to effect FERTILIZATION of an OVUM after a specified period of unprotected intercourse. Male sterility is permanent infertility.,MEDLINEPLUS: <p>Infertility is a term doctors use if a man hasn't been able to get a woman pregnant after at least one year of trying. Male infertility can result from physical problems, hormone problems, and lifestyle or environmental factors.</p><p>About a third of the time, infertility is because of a problem with the man. One third of the time, it is a problem with the <a href='http://www.nlm.nih.gov/medlineplus/femaleinfertility.html'>woman</a>. Sometimes no cause can be found.</p><p>If you suspect you are infertile, see your doctor. There are tests that may tell if you have fertility problems. When it is possible to find the cause, treatments may include medicines, surgery, or assisted reproductive technologies. Happily, two-thirds of couples treated for infertility are able to have babies.</p><p style="font-weight:bold;font-style:italic;">Nation