Perhaps you should try some spelling variations:
decrease perinatal » decrease striatal (Expand search), decrease periodontal (Expand search), estresse perinatal (Expand search)
perinatal effects » perinatal efeito (Expand search), parental effects (Expand search), perinatal efeitos (Expand search)
decrease owing » decrease lodging (Expand search), decrease during (Expand search), decrease in (Expand search)
owing decrease » taping decrease (Expand search), will decrease (Expand search), skins decrease (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » and decrease (Expand search), can increase (Expand search), to decrease (Expand search)
decrease α » decrease _ (Expand search), decrease β (Expand search), decrease in (Expand search)
α decrease » _ decrease (Expand search), to decrease (Expand search), or 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 owing decrease α decrease ) OR ( decrease can decrease perinatal effects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease owing decrease α decrease ) OR ( decrease can decrease perinatal effects ))*.