title: Triplet pregnancies in women aged 40 or older: a matched control study.
authors.affiliation: Department of Obstetrics and Gynecology, Northwestern University, Feinberg School of Medicine, Center for Study of Multiple Birth, 333 East Superior Street, Room 464, Chicago, IL 60611, USA. lgk395@northwestern.edu
authors.forename: Louis G
authors.initials: LG
authors.lastname: Keith
authors.forename: Ran D
authors.initials: RD
authors.lastname: Goldman
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Breborowicz
authors.forename: Isaac
authors.initials: I
authors.lastname: Blickstein
mesh_terms: D000328:Adult; D000367:Age Factors; D001724:Birth Weight; D016022:Case-Control Studies; D005260:Female; D005865:Gestational Age; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D011256:Pregnancy Outcome; D012307:Risk Factors; D014310:Triplets