Perhaps you should try some spelling variations:
decreases sperm » decreased sperm (Expand search), decreases serum (Expand search), decreasing sperm (Expand search)
sperm decrease » term decrease (Expand search), speed decrease (Expand search), speed decreases (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
ratio decrease » rate decrease (Expand search), rapid decrease (Expand search), ratio increase (Expand search)
the decreases » the decrease (Expand search), the decreased (Expand search), use decreases (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease 1st » decrease akt (Expand search), decrease at (Expand search), decrease std (Expand search)
1st basic » at basic (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease the decreases sperm decrease ) OR ( decrease ratio decrease 1st basic ))~.