Thanks for your query.Based on the facts that you have posted it appears that semen analysis
of semen of your husband has detected clumping. The clumping of the sperm is due to either infection or due to presence of sperm antibodies
which tend sperms to agglutinate together and inhibit motility of sperms and thereby prevent fertilization of female egg.
Please consult qualified infertility
specialist and follow his advice .He may try for IVF after washing the sperms with special sperm washing technique to remove antibodies attached to the surface of sperm and utilise it for IVF.