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 lipid » increases lipid (Expand search), increased lipid (Expand search)
not decreases » not decrease (Expand search), not decreased (Expand search), nfoh decreases (Expand search)
lipid pattern » lipid protein (Expand search), fixed pattern (Expand search), wind pattern (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
decrease or » decrease of (Expand search), decrease pro (Expand search), decrease toc (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease NOT decreases sperm decrease ) OR ( decrease OR decrease lipid pattern ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease not decreases sperm decrease ) OR ( decrease or decrease lipid pattern ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease not decreases sperm decrease ) OR ( decrease or decrease lipid pattern ))*.