Karl‐Gösta Nygren

Congenital malformations in infants born after in vitro fertilization in Sweden

Bëngt Källén, Orvar Finnström, Anna Lindam et al. · Birth Defects Research Part A Clinical and Molecular Teratology · 2010 · 191 citations

In vitro fertilization in Sweden: child morbidity including cancer risk

Bëngt Källén, Orvar Finnström, Karl‐Gösta Nygren et al. · Fertility and Sterility · 2005 · 176 citations

Infertility, Cancer Risk, Fertility +9

Cancer Risk in Children and Young Adults Conceived by In Vitro Fertilization

Bëngt Källén, Orvar Finnström, Anna Lindam et al. · PEDIATRICS · 2010 · 159 citations

Blastocyst versus cleavage stage transfer in in vitro fertilization: differences in neonatal outcome?

Bëngt Källén, Orvar Finnström, Anna Lindam et al. · Fertility and Sterility · 2010 · 158 citations · Full text

Fertility, Reproductive Health, Gynecology +17

Effective contraception with the levonorgestrel-releasing intrauterine device: 12-month report of a European multicenter study

Tapani Luukkainen, Hannu Allonen, Maija Haukkamaa et al. · Contraception · 1987 · 130 citations

Contraceptive Use, Hormonal Contraceptive, Fertility +16