abortion rate

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a·bor·tion rate

1. the number of induced abortions per 1000 pregnancies that resulted in a live birth, stillbirth, or induced termination.
2. the number of terminations ×1000 ÷ the female population ages of between 15 and 44 years.


premature expulsion from the uterus of the products of conception; termination of pregnancy before the fetus is viable.

complete abortion
complete expulsion of all the products of conception.
early abortion
abortion within the first third of pregnancy.
epizootic bovine abortion
characterized by serious fetal disease followed by abortion. Endemic in California's coastal range and in the foothill region of the Sierra Nevada, USA. Necropsy findings in the fetus are diagnostic; they include profuse petechiation and severe granulomatous hepatitis. Cause appears to be a novel deltaproteobacterium closely related to members of the order Myxococcales. Transmitted by the tick, Ornithodoros coriaceus. Called also foothill abortion.
habitual abortion
spontaneous abortion occurring in three or more successive pregnancies.
incomplete abortion
abortion in which parts of the products of conception are retained in the uterus.
induced abortion
abortion procured by the veterinarian to eliminate a misalliance, to reduce wastage in animals in a feedlot, to encourage commencement of lactation earlier than would otherwise occur. In cattle manipulation through the rectal wall is a possible way of destroying the viability of the fetus. Induction by the administration of prostaglandins or corticosteroids is more usual. See also pregnancy termination.
infectious abortion
the common causes in the various species are:
Brucella abortus (brucellosis); Campylobacter fetus subsp. venerealis (vibriosis); Campylobacter fetus subsp. fetus; Leptospira pomona, L. hardjo (leptospirosis); Listeria monocytogenes (listeriosis); Arcanobacterium pyogenes; Aspergillus, Absidia and Mucor spp. (fungal abortion); bovine virus diarrhea virus; infectious bovine rhinotracheitis herpesvirus; Chlamydophila abortus; a deltaproteobacterium (epizootic bovine abortion); Coxiella burnetii (Q fever), Neospora caninum.
sheep and goats
Campylobacter fetus subsp. fetus (vibriosis); Campylobacter jejuni; Chlamydophila abortus (enzootic abortion of ewes); Listeria monocytogenes (listeriosis); Salmonella abortus-ovis; Brucella melitensis; Toxoplasma gondii (toxoplasmosis); Brucella ovis (limited occurrence); bluetongue virus; border disease.
Streptococcus equi subsp zooepidemicus; Actinobacillus equuli, A. equisimilis; Rhodococcus equi; leptospirosis, most commonly the pomona serogroup and less frequently serovar grippotyphosa; equine herpesvirus (EHV1); equine viral arteritis (EVA); equine arteritis; Potomac horse fever; and in the USA the mare reproductive loss syndrome associated with ingestion of the Eastern tent caterpillar Malacosoma americanum.
Leptospira pomona, L. grippotyphosa, L. canicola, L. icterohaemorrhagiae (leptospirosis); Erysipelothrix rhusiopathiae (erysipelas); porcine reproductive respiratory syndrome (PRRS) virus; parvovirus; porcine circovirus 2; Aujesky's disease; classical swine fever; and African swine fever.
dog and cat
Brucella canis, feline leukemia virus, feline herpesvirus.
missed abortion
retention of a dead embryo or fetus for more than 1 to 2 weeks.
pine needle abortion
a late-term abortion with retained fetal membranes in cattle caused by ingestion of isocupressic acid in the needles of Pinus spp., commonly P. ponderosa, but also P. jeffryi, P. contorta and Juniperus scopulorum and J. communis. Nutrient deficiency and tree management practices may promote ingestion off the ground as cattle graze through while eating early growing spring grass.
abortion rate
number of abortions as a percentage of the cows in the herd which were diagnosed pregnant in early pregnancy; the target is <2% but rates commonly approach 8% in dairy cattle and 5% in beef cattle.
septic abortion
abortion associated with serious infection of the uterus leading to generalized infection.
spontaneous abortion
abortion occurring naturally. See also spontaneous abortion.
abortion storm
a cluster of abortions occurring at about the same time or in rapid sequence within a group of pregnant females. See also equine viral abortion.
therapeutic abortion
abortion induced by a veterinarian for medical or other health reasons.
References in periodicals archive ?
SANDWELL has one of the highest abortion rates in the country.
The highest abortion rates were in the District of Columbia, New York, New Jersey, Maryland and Florida," Crary reports.
Several factors may have led to a decline in abortion rate, according to the CDC, such as a big drop in adolescent pregnancies, expanded coverage of contraception costs by health care plans, and increased use of effective, long-lasting contraceptive methods.
The estimated age-specific abortion rates for the year preceding the 2009 survey showed an inverted U-shaped pattern: The abortion rate was highest among women aged 30-34 (12 per 1,000) and lowest among teenagers and women aged 40 or older.
For example, the abortion rate among women aged 15-17 decreased from 7.
58) Specific studies from Shanghai, Washington State, Britain, and Scotland all show that easier access to emergency contraception fails to significantly reduce either the abortion rate or the unintended pregnancy rate.
Across England and Wales abortion rates have risen marginally in the past five years from 21 per cent in 2009 to 21.
When broken down by age, abortion rates dropped by 21% among women aged 20-24 years and by 16% among women aged 25-29 years, the two age groups that account for the majority of the procedures.
While the overall abortion rate declined, the proportion of abortions entailing early medication procedures continued to increase.
As a result, Statistics Canada produced its final Canadian teen pregnancy rate statistics for the year 2005 and ended its dissemination of therapeutic abortion rate data with the year 2006.
18, found that while between 1995 and 2003, the abortion rate per 1,000 women of childbearing age worldwide dropped from 35 to 29, in 2008 the rate was 28.
Between 2003 and 2008, the abortion rate worldwide was almost unchanged, going from 29 abortions per 1,000 women aged 15-44 years to 28 abortions per 1,000 women.