My husband has secondary infertility azoospermia. Sco on biopsy. Does he have better odds with tese with prior fertility?

Perhaps. It is unusual but not unheard of to get sperm from men with sertoli cell only syndrome. The fact that he has fathered pregnancies suggests the possibility that there may be small areas of sperm production. A urologist who specializes in male fertility an has expertise in microsurgical tese may have some chance for success.