title: Twinning in women under the age of 20 years.
abstract: A review of twin pregnancies in women under 20 years of age at conception showed a ratio of dizygotic twins to monozygotic twins of 3:2. This is at variance with the ratio previously noted in other age groups.
authors.affiliation: North Manchester General Hospital, UK.
authors.forename: E J
authors.initials: EJ
authors.lastname: Preston
authors.forename: E
authors.initials: E
authors.lastname: Daw