Can methylprednisolone cause infertility if used short-term?

No. Methylprednisolone does not in any way affect fertility. It is a highly effective anti-inflammatory steroid medication. However, long term use of any steroids can have many serious side effects. In short-term use it is generally very safe. Never stop a medication on your own without first discussing your concerns or side effects with your doctor. Doing so can be dangerous to your health.
No. No. Short term steroid exposure for any reason has not been shown to affect fertility.