Multiple birth
Concept
Births: final data for 2002.
2003 · Joyce A Martin, Brady E Hamilton, et al. · PubMed
Births: final data for 2013.
2015 · Joyce A Martin, Brady E Hamilton, et al. · PubMed
Deliveries and children born after in-vitro fertilisation in Sweden 1982–95: a retrospective cohort study
1999 · T. Bergh, A Ericson, et al. · The Lancet