David M. Fergusson - Revision history

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2026-03-27T16:08:21Z

Studies By David M. Fergusson

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 ::Results:There was consistent evidence to show that abortion was not associated with a reduction in rates of mental health problems (p>0.75). Abortion was associated with small to moderate increases in risks of anxiety (AOR 1.28, 95% CI 0.97-1.70; p<0.08), alcohol misuse (AOR 2.34, 95% CI 1.05-5.21; p<0.05), illicit drug use/misuse (AOR 3.91, 95% CI 1.13-13.55; p<0.05), and suicidal behaviour (AOR 1.69, 95% CI 1.12-2.54; p<0.01).
 ::Conclusions:There is no available evidence to suggest that abortion has therapeutic effects in reducing the mental health risks of unwanted or unintended pregnancy. There is suggestive evidence that abortion may be associated with small to moderate increases in risks of some mental health problems.
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 ''[http://www.ncbi.nlm.nih.gov/pubmed/19043144?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=1&log$=relatedarticles&logdbfrom=pubmed Abortion and mental health disorders: evidence from a 30-year longitudinal study.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2008 Dec;193(6):444-51.''

Barb: /* Studies By David M. Fergusson */

2015-11-25T15:54:48Z

Studies By David M. Fergusson

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	[http://www.ncbi.nlm.nih.gov/pubmed/23553240 Does abortion reduce the mental health risks of unwanted or unintended pregnancy? A re-appraisal of the evidence.] Fergusson DM, Horwood LJ, Boden JM. Aust N Z J Psychiatry. 2013 Apr 3. [Epub ahead of print]		[http://www.ncbi.nlm.nih.gov/pubmed/23553240 Does abortion reduce the mental health risks of unwanted or unintended pregnancy? A re-appraisal of the evidence.] Fergusson DM, Horwood LJ, Boden JM. Aust N Z J Psychiatry. 2013 Apr 3. [Epub ahead of print]

	:This review of the literature and ~~meta-analysis concludes~~ there is no evidence of any mental health benefits from abortion, rather the evidence indicates that in the general population of women there is at least some negative mental health impact due to abortion. This means that abortions that there is no justification for providing abortion to reduce mental health problems, which is the legal justification used for over 90% of abortions in the United Kingdom.		:This review of the literature and prospective study, the authors conclude there is no evidence of any mental health benefits from abortion, rather the evidence indicates that in the general population of women there is at least some negative mental health impact due to abortion. This means that abortions that there is no justification for providing abortion to reduce mental health problems, which is the legal justification used for over 90% of abortions in the United Kingdom.

	:Abstract		:Abstract

Barb: /* Studies By David M. Fergusson */

2013-05-14T21:18:11Z

Studies By David M. Fergusson

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	:This review of the literature and meta-analysis concludes there is no evidence of any mental health benefits from abortion, rather the evidence indicates that in the general population of women there is at least some negative mental health impact due to abortion. This means that abortions that there is no justification for providing abortion to reduce mental health problems, which is the legal justification used for over 90% of abortions in the United Kingdom.		:This review of the literature and meta-analysis concludes there is no evidence of any mental health benefits from abortion, rather the evidence indicates that in the general population of women there is at least some negative mental health impact due to abortion. This means that abortions that there is no justification for providing abortion to reduce mental health problems, which is the legal justification used for over 90% of abortions in the United Kingdom.

			:Abstract
			::Objective:There have been debates about the linkages between abortion and mental health. Few reviews have considered the extent to which abortion has therapeutic benefits that mitigate the mental health risks of abortion. The aim of this review was to conduct a re-appraisal of the evidence to examine the research hypothesis that abortion reduces rates of mental health problems in women having unwanted or unintended pregnancy.
			::Methods:Analysis of recent reviews (Coleman, 2011; National Collaborating Centre for Mental Health, 2011) identified eight publications reporting 14 adjusted odds ratios (AORs) spanning five outcome domains: anxiety; depression; alcohol misuse; illicit drug use/misuse; and suicidal behaviour. For each outcome, pooled AORs were estimated using a random-effects model.
			::Results:There was consistent evidence to show that abortion was not associated with a reduction in rates of mental health problems (p>0.75). Abortion was associated with small to moderate increases in risks of anxiety (AOR 1.28, 95% CI 0.97-1.70; p<0.08), alcohol misuse (AOR 2.34, 95% CI 1.05-5.21; p<0.05), illicit drug use/misuse (AOR 3.91, 95% CI 1.13-13.55; p<0.05), and suicidal behaviour (AOR 1.69, 95% CI 1.12-2.54; p<0.01).
			::Conclusions:There is no available evidence to suggest that abortion has therapeutic effects in reducing the mental health risks of unwanted or unintended pregnancy. There is suggestive evidence that abortion may be associated with small to moderate increases in risks of some mental health problems.

Barb: /* Studies By David M. Fergusson */

2013-05-14T21:16:43Z

Studies By David M. Fergusson

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	== Studies By David M. Fergusson ==		== Studies By David M. Fergusson ==
			[http://www.ncbi.nlm.nih.gov/pubmed/23553240 Does abortion reduce the mental health risks of unwanted or unintended pregnancy? A re-appraisal of the evidence.] Fergusson DM, Horwood LJ, Boden JM. Aust N Z J Psychiatry. 2013 Apr 3. [Epub ahead of print]

			:This review of the literature and meta-analysis concludes there is no evidence of any mental health benefits from abortion, rather the evidence indicates that in the general population of women there is at least some negative mental health impact due to abortion. This means that abortions that there is no justification for providing abortion to reduce mental health problems, which is the legal justification used for over 90% of abortions in the United Kingdom.



	''[http://www.ncbi.nlm.nih.gov/pubmed/19880932?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=1 Reactions to abortion and subsequent mental health.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2009 Nov;195(5):420-6.''		''[http://www.ncbi.nlm.nih.gov/pubmed/19880932?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=1 Reactions to abortion and subsequent mental health.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2009 Nov;195(5):420-6.''

WikiSysop at 16:15, 8 June 2010

2010-06-08T16:15:20Z

← Older revision		Revision as of 11:15, 8 June 2010
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	==Studies By David M. Fergusson==		== Studies By David M. Fergusson ==

			''[http://www.ncbi.nlm.nih.gov/pubmed/19880932?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=1 Reactions to abortion and subsequent mental health.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2009 Nov;195(5):420-6.''

	~~''[http~~:~~//www.ncbi.nlm.nih.gov/pubmed/19880932?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=1 Reactions~~ to abortion ~~and subsequent mental health.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2009 Nov;195(5):420-6~~.''		:BACKGROUND: There has been continued interest in the extent to which women have positive and negative reactions to abortion.

	:~~BACKGROUND~~: ~~There has been continued interest in the extent~~ to ~~which women have positive~~ and ~~negative~~ reactions to abortion.		:AIMS: To document emotional reactions to abortion, and to examine the links between reactions to abortion and subsequent mental health outcomes.

	:~~AIMS~~: ~~To document emotional reactions to abortion, and to examine~~ the ~~links between reactions to abortion~~ and ~~subsequent~~ mental health ~~outcomes~~.		:METHOD: Data were gathered on the pregnancy and mental health history of a birth cohort of over 500 women studied to the age of 30.

	~~:METHOD: Data were gathered on the pregnancy and mental health history of a birth cohort of over 500 women studied to the age of 30.~~		:RESULTS: Abortion was associated with high rates of both positive and negative emotional reactions; however, nearly 90% of respondents believed that the abortion was the right decision. Analyses showed that the number of negative responses to the abortion was associated with increased levels of subsequent mental health disorders (P<0.05). Further analyses suggested that, after adjustment for confounding, those having an abortion and reporting negative reactions had rates of mental health disorders that were approximately 1.4-1.8 times higher than those not having an abortion.

	:RESULTS: Abortion was associated with high rates of both positive and negative emotional reactions; however, nearly 90% of respondents believed that the abortion was the right decision. Analyses showed that the number of negative responses to the abortion was associated with increased levels of subsequent mental health disorders (P<0.05). Further analyses suggested that, after adjustment for confounding, those having an abortion and reporting negative reactions had rates of mental health disorders that were approximately 1.4-1.8 times higher than those not having an abortion.

	:CONCLUSIONS: Abortion was associated with both positive and negative emotional reactions. The extent of negative emotional reactions appeared to modify the links between abortion and subsequent mental health problems.		:CONCLUSIONS: Abortion was associated with both positive and negative emotional reactions. The extent of negative emotional reactions appeared to modify the links between abortion and subsequent mental health problems.

	''[http://www.ncbi.nlm.nih.gov/pubmed/19043144?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=1&log$=relatedarticles&logdbfrom=pubmed Abortion and mental health disorders: evidence from a 30-year longitudinal study.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2008 Dec;193(6):444-51.		''[http://www.ncbi.nlm.nih.gov/pubmed/19043144?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=1&log$=relatedarticles&logdbfrom=pubmed Abortion and mental health disorders: evidence from a 30-year longitudinal study.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2008 Dec;193(6):444-51.''

	:BACKGROUND: Research on the links between abortion and mental health has been limited by design problems and relatively weak evidence.		:BACKGROUND: Research on the links between abortion and mental health has been limited by design problems and relatively weak evidence.
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	:CONCLUSIONS: The evidence is consistent with the view that abortion may be associated with a small increase in risk of mental disorders. Other pregnancy outcomes were not related to increased risk of mental health problems.		:CONCLUSIONS: The evidence is consistent with the view that abortion may be associated with a small increase in risk of mental disorders. Other pregnancy outcomes were not related to increased risk of mental health problems.

	''[http://www.ncbi.nlm.nih.gov/pubmed/16405636?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=3&log$=relatedarticles&logdbfrom=pubmed Abortion in young women and subsequent mental health.]'' Fergusson DM, John Horwood L, Ridder EM. J Child Psychol Psychiatry. 2006 Jan;47(1):16-24.		''[http://www.ncbi.nlm.nih.gov/pubmed/16405636?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=3&log$=relatedarticles&logdbfrom=pubmed Abortion in young women and subsequent mental health.]'' Fergusson DM, John Horwood L, Ridder EM. J Child Psychol Psychiatry. 2006 Jan;47(1):16-24.

	:BACKGROUND: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years.		:BACKGROUND: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years.
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	:CONCLUSIONS: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.		:CONCLUSIONS: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.

	==Commentaries==		== Commentaries ==
	''[http://wthrockmorton.com/wp-content/uploads/2008/09/abortion-mh-editorial-2008.pdf Abortion and mental health] (commentary) Fergusson DM. Psychiatric Bulletin (2008), 32, 321-324.
			''[http://wthrockmorton.com/wp-content/uploads/2008/09/abortion-mh-editorial-2008.pdf Abortion and mental health] (commentary) Fergusson DM. Psychiatric Bulletin (2008), 32, 321-324.''

			== Media Coverage ==

	==~~Media Coverage==~~		[http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10607135 Abortion link to mental illness] New Zealand Herald Nov 4, 2009

	[http://www.~~nzherald~~.co.nz/nz/~~news~~/~~article.cfm?c_id=1&objectid=10607135~~ Abortion ~~link to~~ mental ~~illness~~] ~~New Zealand Herald Nov 4, 2009~~		[http://www.telegraph.co.uk/health/healthnews/6481289/Abortion-can-put-women-at-increased-risk-of-mental-health-problems-says-study.html Daily Telegraph]

	[~~http~~:~~//www.telegraph.co.uk/health/healthnews/6481289/Abortion-can-put-women-at-increased-risk-of-mental-health-problems-says-study.html Daily Telegraph~~]		[[Category:Research]][[Category:Persons_of_Note]]

WikiSysop: /* Studies By David M. Fergusson */

2009-11-09T17:22:06Z

Studies By David M. Fergusson

← Older revision		Revision as of 12:22, 9 November 2009
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	''[http://www.ncbi.nlm.nih.gov/pubmed/16405636?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=3&log$=relatedarticles&logdbfrom=pubmed Abortion in young women and subsequent mental health.]'' Fergusson DM, John Horwood L, Ridder EM. J Child Psychol Psychiatry. 2006 Jan;47(1):16-24.		''[http://www.ncbi.nlm.nih.gov/pubmed/16405636?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=3&log$=relatedarticles&logdbfrom=pubmed Abortion in young women and subsequent mental health.]'' Fergusson DM, John Horwood L, Ridder EM. J Child Psychol Psychiatry. 2006 Jan;47(1):16-24.

	:~~Background~~: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. ~~Methods~~: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. ~~Results~~: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. ~~Conclusions~~: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.		:BACKGROUND: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years.
			:METHODS: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors.
			:RESULTS: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors.
			:CONCLUSIONS: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.

	==Commentaries==		==Commentaries==

WikiSysop at 17:13, 9 November 2009

2009-11-09T17:13:54Z

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	Studies By David M. Fergusson		==Studies By David M. Fergusson==


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	:Background: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. Methods: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. Results: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. Conclusions: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.		:Background: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. Methods: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. Results: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. Conclusions: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.

			==Commentaries==
	''[http://wthrockmorton.com/wp-content/uploads/2008/09/abortion-mh-editorial-2008.pdf Abortion and mental health] (commentary) Fergusson DM. Psychiatric Bulletin (2008), 32, 321-324.		''[http://wthrockmorton.com/wp-content/uploads/2008/09/abortion-mh-editorial-2008.pdf Abortion and mental health] (commentary) Fergusson DM. Psychiatric Bulletin (2008), 32, 321-324.

			==Media Coverage==

			[http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10607135 Abortion link to mental illness] New Zealand Herald Nov 4, 2009

			[http://www.telegraph.co.uk/health/healthnews/6481289/Abortion-can-put-women-at-increased-risk-of-mental-health-problems-says-study.html Daily Telegraph]

WikiSysop at 20:06, 3 November 2009

2009-11-03T20:06:59Z

← Older revision		Revision as of 15:06, 3 November 2009
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	:Background: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. Methods: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. Results: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. Conclusions: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.		:Background: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. Methods: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. Results: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. Conclusions: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.

			''[http://wthrockmorton.com/wp-content/uploads/2008/09/abortion-mh-editorial-2008.pdf Abortion and mental health] (commentary) Fergusson DM. Psychiatric Bulletin (2008), 32, 321-324.

WikiSysop at 17:03, 3 November 2009

2009-11-03T17:03:20Z

← Older revision		Revision as of 12:03, 3 November 2009
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	''[http://www.ncbi.nlm.nih.gov/pubmed/19880932?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=1 Reactions to abortion and subsequent mental health.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2009 Nov;195(5):420-6.''		''[http://www.ncbi.nlm.nih.gov/pubmed/19880932?itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=1 Reactions to abortion and subsequent mental health.] Fergusson DM, Horwood LJ, Boden JM. Br J Psychiatry. 2009 Nov;195(5):420-6.''

	:BACKGROUND: There has been continued interest in the extent to which women have positive and negative reactions to abortion. AIMS: To document emotional reactions to abortion, and to examine the links between reactions to abortion and subsequent mental health outcomes.		:BACKGROUND: There has been continued interest in the extent to which women have positive and negative reactions to abortion.

			:AIMS: To document emotional reactions to abortion, and to examine the links between reactions to abortion and subsequent mental health outcomes.

	:METHOD: Data were gathered on the pregnancy and mental health history of a birth cohort of over 500 women studied to the age of 30.		:METHOD: Data were gathered on the pregnancy and mental health history of a birth cohort of over 500 women studied to the age of 30.

WikiSysop at 16:19, 3 November 2009

2009-11-03T16:19:47Z

← Older revision		Revision as of 11:19, 3 November 2009
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	:CONCLUSIONS: The evidence is consistent with the view that abortion may be associated with a small increase in risk of mental disorders. Other pregnancy outcomes were not related to increased risk of mental health problems.		:CONCLUSIONS: The evidence is consistent with the view that abortion may be associated with a small increase in risk of mental disorders. Other pregnancy outcomes were not related to increased risk of mental health problems.

	''Abortion in young women and subsequent mental health.'' Fergusson DM, John Horwood L, Ridder EM. J Child Psychol Psychiatry. 2006 Jan;47(1):16-24.		''[http://www.ncbi.nlm.nih.gov/pubmed/16405636?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_SingleItemSupl.Pubmed_Discovery_RA&linkpos=3&log$=relatedarticles&logdbfrom=pubmed Abortion in young women and subsequent mental health.]'' Fergusson DM, John Horwood L, Ridder EM. J Child Psychol Psychiatry. 2006 Jan;47(1):16-24.

	:Background: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. Methods: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. Results: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. Conclusions: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.		:Background: The extent to which abortion has harmful consequences for mental health remains controversial. We aimed to examine the linkages between having an abortion and mental health outcomes over the interval from age 15-25 years. Methods: Data were gathered as part of the Christchurch Health and Development Study, a 25-year longitudinal study of a birth cohort of New Zealand children. Information was obtained on: a) the history of pregnancy/abortion for female participants over the interval from 15-25 years; b) measures of DSM-IV mental disorders and suicidal behaviour over the intervals 15-18, 18-21 and 21-25 years; and c) childhood, family and related confounding factors. Results: Forty-one percent of women had become pregnant on at least one occasion prior to age 25, with 14.6% having an abortion. Those having an abortion had elevated rates of subsequent mental health problems including depression, anxiety, suicidal behaviours and substance use disorders. This association persisted after adjustment for confounding factors. Conclusions: The findings suggest that abortion in young women may be associated with increased risks of mental health problems.