7 Studies: Abortion and Subsequent Risk of Preterm Delivery (1993-2005)

Abortion and Subsequent Premature Birth (3/05) There are over 40 studies that demonstrate a statistically significant association between abortion and subsequent premature birth, especially extreme premature birth (XPB):  1993 Study: An Australian study by Lumley in l993 showed that having 3 abortions (mostly suction) is associated with a risk ratio of 5.6 for XPB (22-28 wks) (data base 121,000 deliveries). Reduce Preterm Risk Coalition Comments: Extremely preterm newborn (<28 weeks' gestation) have about THIRTY-EIGHT (38) times the risk of CP (Cerebral Palsy) as the general population of newborn.  In 1993 the truly great Australian preterm birth expert Judith Lumley reported that prior induced abortions boosted the risk of EXTREMELY newborn; one prior IA boosted relative XPB risk by 55% and two prior IAs boosted XPB risk by 146%. (Lumley J. The epidemiology of preterm birth. Bailliere's Clin Obstet Gynecology.1993;7(3):477-498) [comments by Brent Rooney, Reduce Preterm Risk Coalition, Vancouver, Canada www.jpands.org/vol8no2/rooney.pdf]   1998 Studies: Dr. DeCook:  In 1998, (data base of 243,000 deliveries), Lumley showed that 4 or more IAs [induced abortions] had a risk increase of 9 fold-NINE times the primagravida controls.  A 1998 study from Bavaria (data base 106,000) showed, for less than 32 wk deliveries, a RR of 2.5 after 1 abortion, 5.2 after 2 abortions, and 8.0 after 3 abortions.  1999 Study: A 1999 Danish study showed that a D&E [abortion] increased the risk of PTB [Pre-Term Birth] substantially:  after 1 D&E , RR 2.2,; after 2 D&Es, RR 12.5. 2002 Thorpe Study: The Thorpe study (Jan 2002, OB GYN Survey) noted 12 studies finding an association between IA and PTB, with an "increased risk of...