Your semen report shows a good total count, but 50% dead sperm and pus cells of 4 to 6 per HPF suggest reduced sperm quality, often linked to an underlying infection. Methotrexate, which you are currently taking, is well known to reduce sperm production and quality, so it is a reasonable medicine to review while you are trying to conceive.
Next Steps
Ask your rheumatologist whether a fertility-friendly alternative is possible while you are planning a baby. A fertility specialist can also treat the pus cells in your semen, which often improves with a short course of treatment and repeat testing after.
Health Tips
Please do not stop or change your rheumatology medicine on your own. Discuss this with your rheumatologist and a fertility specialist together, so your joint condition stays controlled while you plan for a baby.