Perhaps you should try some spelling variations:
ovarian patterns » varied patterns (Expand search), variation patterns (Expand search), location patterns (Expand search)
decrease ovarian » decreases ovarian (Expand search), decreased ovarian (Expand search), decrease asian (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
ratio decrease » rate decrease (Expand search), brazil decrease (Expand search), to decrease (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease hiv (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease risk decrease ratio decrease ) OR ( decrease in decrease ovarian patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease risk decrease ratio decrease ) OR ( decrease in decrease ovarian patterns ))*.