Welcome to HCM.
You mean to say about the post coital test from your wife's cervical secretion. How long after the coitus the test was done?
The dead sperms in the cervical mucus may be due to infection of cervix, absence of fructose in your semen, infection of your genital tract or antibodies
present either with you or with your wife against the sperms.
The sperm count
can be increased with drugs like Clomiphene
citrate tablets or with appropriate hormones. Any abnormality of your genitals (Varicocele, undescended testis
, epidydimitis etc ) have to be ruled out by examination before treatment.
If you consult an infertility
specialist the will guide to overcome this problem.
Wish you good luck.