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OBJECTIVE Our purpose was to study low birth weight and preterm birth after short interpregnancy intervals. METHODS Follow-up of a cohort of a register-based random sample of women who had at least two live births in Denmark between 1980 and 1992. Frequency of preterm birth (gestational age <37 weeks) and low birth weight (<2500 gm) were studied as a function of the interpregnancy interval in 10,187 women. RESULTS Short interpregnancy intervals (< or =8 months) were associated with preterm birth but not with low birth weight. The adjusted odds ratios for preterm birth were 3.60 (95% confidence interval 2.04 to 6.35) for intervals up to 4.00 months and 2.28 (1.49 to 3.48) for intervals between 4.01 and 8.00 months compared with deliveries after 24 to 36 months, in which the risk of preterm birth was 3.5%. Risks were higher in women with a previous pregnancy at term. Social status, age, and parity were adjusted for. CONCLUSIONS Short interpregnancy intervals were associated with an increased risk of premature delivery. This risk should be taken into account when planning a new pregnancy.
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
November 2009,
The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians,
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
July 2018,
The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians,
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
July 2008,
The American journal of clinical nutrition,
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
January 2015,
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O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
January 1992,
Social biology,
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
May 1999,
Epidemiology (Cambridge, Mass.),
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
February 2025,
BMC pregnancy and childbirth,
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
April 2015,
Maternal and child health journal,
O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
July 2025,
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O Basso, and
J Olsen, and
L B Knudsen, and
K Christensen
May 1998,
The Journal of pediatrics,
