Mandatory parental involvement in minors' abortions: effects of the laws in Minnesota, Missouri, and Indiana.
OBJECTIVE
This study examined the effects of parental involvement laws on the birth rate, in-state abortion rate, odds of interstate travel, and odds of late abortion for minors.


METHODS
Poisson and logistic regression models fitted to vital records compared the periods before and after the laws were enforced.


RESULTS
In each state, the in-state abortion rate for minors fell (relative to the rate for older women) when parental involvement laws took effect. Data offered no empirical support for the proposition that the laws drive up birth rates for minors. Although data were incomplete, the laws appeared to increase the odds of a minor's traveling out of state for her abortion. If one judges from the available data, minors who traveled out of state may have accounted for the entire observed decline in the in-state abortion rate, at least in Missouri. The laws appeared to delay minors' abortions past the eighth week, but probably not into the second trimester.


CONCLUSIONS
Several empirical arguments used against and in support of parental involvement laws do not appear to be substantiated.
Ellertson
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C
Population Council, New York, NY 10017, USA.
D000023:Abortion Applicants / Q000331:legislation & jurisprudence* / Q000706:statistics & numerical data; D000029:Abortion, Legal / Q000706:statistics & numerical data; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001723:Birth Rate / Q000639:trends; D036262:Empirical Research; D005260:Female; D033161:Government Regulation; D006801:Humans; D007196:Indiana; D008910:Minnesota; D033242:Minors; D008923:Missouri; D033282:Parental Consent; D035622:Parental Notification; D010290:Parents; D011247:Pregnancy; D037841:Pregnant People