Pregnancy spacing among women delaying initiation of childbearing

Archives of Gynecology and Obstetrics
Sarah K NabukeraRussell S Kirby


An increasing proportion of women in the US and other countries delay initiation of childbearing until their thirties. Little is known about their subsequent pregnancies, particularly with regard to pregnancy spacing. To determine interpregnancy interval (IPI) patterns, factors associated with IPI among women delaying initiation of childbearing until their thirties, and ascertain if delay in initiation of childbearing is associated with increased likelihood for short interpregnancy interval of less than 6 months. A retrospective cohort study was performed using the Missouri maternal linked file for 1978-1997, inclusive. Analysis was limited to mothers aged 20-50 years at first pregnancy, having a first and second pregnancy during the study period; the sample size included 242,559 mother-infant pairs. Analysis strategies included stratified analysis, and multivariable logistic regression. Interpregnancy interval was main outcome variable, and was grouped in seven categories: 0-5, 6-11, 12-17, 18-23, 24-59, 60-119, >or=120 months. The mean interpregnancy interval was significantly shorter for women delaying start of childbearing (>or=30 years) compared to 20-29 year olds. Observed intervals are 31 (+/-24) months for mothers aged ...Continue Reading


Mar 8, 1990·The New England Journal of Medicine·G S BerkowitzR L Berkowitz
Jun 1, 1988·American Journal of Public Health·M A Klebanoff
Jun 1, 1987·European Journal of Obstetrics, Gynecology, and Reproductive Biology·M J BrassilD W MacDonald
Jan 1, 1987·American Journal of Epidemiology·S E Barkan, M B Bracken
Feb 1, 1996·Obstetrics and Gynecology·G R AlexanderM Kogan
Feb 3, 1998·European Journal of Obstetrics, Gynecology, and Reproductive Biology·G Breart
Mar 21, 1998·American Journal of Obstetrics and Gynecology·O BassoK Christensen
Aug 14, 1998·American Journal of Public Health·L V KlermanR L Goldenberg
Feb 20, 1999·Pediatrics·R S Kirby, M Malnory
Feb 25, 1999·The New England Journal of Medicine·B P ZhuJ M Horan
May 31, 2001·Acta Obstetricia Et Gynecologica Scandinavica·F M KaharuzaO Basso
Feb 22, 2002·Paediatric and Perinatal Epidemiology·Paola Astolfi, Laura A Zonta
Sep 25, 2002·European Journal of Obstetrics, Gynecology, and Reproductive Biology·David RoussoIoannis Kalahanis
Feb 7, 2003·Journal of Obstetric, Gynecologic, and Neonatal Nursing : JOGNN·Mary Carolan
Aug 9, 2003·BMJ : British Medical Journal·Gordon C S SmithRichard Dobbie
Feb 26, 2005·The Australian & New Zealand Journal of Obstetrics & Gynaecology·Leonie K CallawayH David McIntyre
Apr 9, 2005·Social Science & Medicine·Ushma D Upadhyay, Michelle J Hindin
Apr 12, 2005·International Journal of Gynaecology and Obstetrics : the Official Organ of the International Federation of Gynaecology and Obstetrics·M Norton
May 3, 2005·Obstetrics and Gynecology·Jane Cleary-GoldmanUNKNOWN FASTER Consortium
Oct 1, 2005·American Journal of Public Health·Mona T Lydon-RochelleThomas R Easterling
Apr 4, 2006·American Journal of Obstetrics and Gynecology·Alison G Cahill, George A Macones
Apr 4, 2006·Obstetrics and Gynecology·Hamisu M SalihuJohn Smulian
Apr 20, 2006·JAMA : the Journal of the American Medical Association·Agustin Conde-AgudeloAna Cecilia Kafury-Goeta
Apr 4, 2007·American Journal of Obstetrics and Gynecology·Agustin Conde-AgudeloAna C Kafury-Goeta
Sep 11, 2007·American Journal of Obstetrics and Gynecology·Emily A DeFrancoLouis J Muglia

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