Definitions
Teenage pregnancy is defined in this article as a pregnancy of a woman who was aged 15 to 19 when her pregnancy ended. Pregnancies are calculated as the sum of live births, induced abortions, and fetal loss (stillbirths and miscarriages) for which administrative records are available.
The teenage pregnancy rate is the number of pregnancies per
1,000 women aged 15 to 19.
The teenage live birth rate is the number of live births per 1,000
women aged 15 to 19.
Unless otherwise indicated, the term “abortion” is used in this
article to refer to induced abortions. The teenage abortion rate is
the number of induced abortions per 1,000 women aged 15 to 19.
Fetal loss is the sum of miscarriages plus stillbirths. Miscarriages are pregnancies that end by spontaneous abortion before 20 weeks’ gestation and include only those records with diagnoses of ICD-9 634, 636 or 63716 that required inpatient care. A stillbirth is a product of conception of 20 or more weeks. gestation or fetal weight of 500 grams or more, which did not breathe or show other signs of life.
The teenage fetal loss rate is the number of miscarriages plus stillbirths per 1,000 women aged 15 to 19.
In this analysis, the expression, “ending” a pregnancy covers the three outcomes: live birth, induced abortion, and hospitalized fetal loss.
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