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Finland
Pregnancy
Gestational Age
Birth Weight
Registries
Pregnancy Outcomes
Cohort Studies
Risk Factors
Retrospective Studies
Infant Mortality
Parity
Maternal Age
Newborn Infant
Young Adult
Fertilizations in Vitro
Infants
Pregnancy Complications
Premature Birth
Obstetric Delivery
Case Control Studies
Co-Publications
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9
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