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Objective
To investigate the association between in vitro fertilisation IVF and severe maternal morbidity (SMM) and to explore the role of multiple pregnancy as an intermediate factor.
Design
Population‐based cohort‐nested case–control study.
Setting
Six French regions in 2012/13.
Population
Cases were 2540 women with SMM according to the EPIMOMS definition; controls were 3651 randomly selected...
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