# birth rate

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Related to Fertility Rates: TFR

## rate

[rāt]
the speed or frequency with which an event or circumstance occurs per unit of time, population, or other standard of comparison.
adjusted rate a fictitious summary rate statistically adjusted to remove the effect of a variable, such as age or sex, to permit unbiased comparison between groups having different compositions with respect to these variables. See also crude rate and specific rate.
attack rate in the analysis of acute outbreaks of disease, the proportion of persons who are exposed to the disease during the outbreak who do become ill.
basal metabolic rate an expression of the rate at which oxygen is utilized in a fasting subject at complete rest as a percentage of a value established as normal for such a subject. Abbreviated BMR.
birth rate the number of live births in a geographic area in a defined period, usually one year, relative to some specified population. For the crude birth rate, it is the average total population or the midyear population in the area during the period. Specific birth rates for subsets of the population may also be calculated, for example, an age-specific birth rate is limited to the population of females of a defined age range.
case fatality rate the number of deaths due to a specific disease as compared to the total number of cases of the disease.
crude rate one giving the total number of events occurring in an entire population over a period of time, without reference to any of the individuals or subgroups within the population. See also adjusted rate and specific rate.
death rate the number of deaths in a certain period of time divided by the total of a given population. The crude death rate is the ratio of the number of deaths in a geographic area in one year divided by the average population in the area during the year. The age-specific death rate is the ratio of the number of deaths occurring in a specified age group to the average population of that group. The cause-specific death rate is the ratio of the number of deaths due to a specified cause to the average total population. Called also mortality rate.
Historic example of death rates (per 100,000) for leading causes of death for men aged 25–44 years. From Centers for Disease Control and Prevention: Morbidity and Mortality Weekly Report 42:483, 1993.
DEF rate an expression of dental caries experienced in primary teeth, calculated by adding number of those requiring filling (D), decayed teeth requiring extraction (E), and those that have already been successfully filled (F); missing primary teeth are not included in the calculation.
DMF rate an expression of the condition of the permanent teeth based on the number of teeth decayed, missing (or indicated for removal), and filled or bearing restorations. It is calculated by adding the number of carious permanent teeth requiring filling (D), carious ones requiring extraction (Mr), ones previously extracted because of caries (Mp), and permanent teeth (F).
dose rate the amount of any therapeutic agent administered per unit of time.
erythrocyte sedimentation rate (ESR) see erythrocyte sedimentation rate.
fatality rate the death rate in a specific group of persons simultaneously affected by some event or circumstances, such as a natural disaster.
fertility rate a measure of fertility in a defined population over a specified period of time, usually one year; particularly the general fertility rate, but also including more specific rates such as those for females of a given parity or a particular age range or that describing the completed rate for females who have finished childbearing.
fetal death rate the ratio of the number of fetal deaths in one year to the total number of both live births and fetal deaths in that year.
five-year survival rate an expression of the number of survivors with no trace of a given disease five years after each has been diagnosed or treated for the disease.
flow rate flow (def. 2).
forced expiratory flow rate forced expiratory flow.
general fertility rate the most widely used measure of fertility; the number of live births in a geographic area in a year per 1000 women of childbearing age, which is usually defined as age 15 to 44 years.
glomerular filtration rate an expression of the quantity of glomerular filtrate formed each minute in the nephrons of both kidneys, calculated by measuring the clearance of specific substances, e.g., inulin or creatinine.
growth rate an expression of the increase in size of an organic object per unit of time.
heart rate the number of contractions of the cardiac ventricles per unit of time (usually per minute).
incidence rate the risk of developing a particular disease during a given period of time; the numerator of the rate is the number of new cases during the specified time period and the denominator is the population at risk during the period. Compare prevalence r.
infant mortality rate the ratio of the number of deaths in one year of children less than one year of age to the number of live births in that year.
intrinsic rate in cardiac pacing terminology, the heart rate unaided by an artificial pacemaker, expressed in beats per minute (bpm). See also cycle length.
maternal mortality rate a rate in which the numerator is the number of maternal deaths ascribed to puerperal causes in one year; the number of live births in that year is often used as the denominator, although to make a true rate the denominator should be the number of pregnancies (live births plus fetal deaths). Called also puerperal mortality rate.
maximal expiratory flow rate (MEFR) maximal expiratory flow.
maximal midexpiratory flow rate (MMFR) maximal midexpiratory flow.
mendelian rate an expression of the numerical relations of the occurrence of distinctly contrasted mendelian characteristics in succeeding generations of hybrid offspring.
metabolic rate an expression of the amount of oxygen consumed by the body cells.
morbidity rate an inexact term that can mean either the incidence rate or the prevalence rate.
mortality rate death rate.
neonatal mortality rate the ratio of the number of deaths in one year of children less than 28 days of age to the number of live births in that year.
paced rate in cardiac pacing terminology, the rate of pulses of an artificial pacemaker, expressed as pulses per minute (ppm). See also cycle length.
perinatal mortality rate the ratio of the number of the sum of fetal deaths after 28 or more weeks of gestation (stillbirths) and deaths of infants less than 7 days of age in one time period and population to the sum of the number of live births and fetal deaths after 28 or more weeks of gestation (stillbirths) in that same time period and population.
postneonatal mortality rate the ratio of the number of deaths in a given year of children between the 28th day of life and the first birthday relative to the difference between the number of the live births and neonatal deaths in that year; the denominator is sometimes simplified, less correctly, to the number of live births. The ratio is sometimes approximated as the difference between the infant mortality rate and the neonatal mortality rate.
prevalence rate the number of people in a population who have a disease at a given time; the numerator is the number of existing cases of disease at a specified time and the denominator is the total population. Time may be a point or a defined interval, and is traditionally the former if unspecified. Compare incidence r.
puerperal mortality rate maternal mortality r.
pulse rate the rate of the pulse, measured as number of pulsations in an artery per unit of time; normally between 60 and 80 per minute in an adult.
respiration rate the number of inhalations and exhalations per unit of time, usually measured by observation of chest movements and averaging 16 to 20 per minute in an adult.
sedimentation rate the rate at which a sediment is deposited in a given volume of solution, especially when subjected to the action of a centrifuge; see also erythrocyte sedimentation rate.
slew rate in cardiac pacing, the rate, expressed in units of mV/msec, at which an R wave reaches peak amplitude; it represents the maximum rate of change of amplifier output voltage.
specific rate a rate that applies to a specific demographic subgroup, e.g., individuals of a specific age, sex, or race, giving the total number of events in relation only to that subgroup. See also adjusted rate and crude rate.
stillbirth rate fetal death rate.

## birth rate

a summary rate based on the number of live births in a population over a given period, usually 1 year; the numerator is the number of live births, the denominator is the midyear population.

## birth rate

the proportion of the number of live births in a specific area during a given period to the total population of that area, usually expressed as the number of births per 1000 of population. Compare crude birth rate, refined birth rate, true birth rate.

## birth rate

The number of live births divided by the average population, or the population at midyear.

## birth rate

Crude birth rate The number of live births divided by the average population, or the population at midyr. Cf Mortality rate.

## birth rate

the average number of offspring produced by a female in a given time. This is calculated as the total number of new individuals added to the population during the time in question, divided by the number of mature breeding females in the population at that time.

## birth

a coming into being; the act or process of being born. See also parturition.

birth canal
the canal through which the fetus passes in birth; comprising the uterus, cervix, vagina and vulva.
birth cohort
see cohort.
birth control
a term rarely used in dealing with animals. Instead see population control, contraception.
birth defects
see congenital defects.
birth difficulties
dystocia.
birth injury
occurs to the fetus during birth. Includes rib fracture and meningeal hemorrhage.
birth interval
multiple birth
the birth of two or more offspring produced in the same gestation period.
birth order
the chronological order of births in a multiple birth. May have significance in causing stillbirths if the intervals between births are prolonged because of inertia.
premature birth
expulsion of the fetus from the uterus before termination of the normal gestation period, but after independent existence has become a possibility. In humans prematurity is defined as a pregnancy of less than 37 weeks in a pregnancy normally lasting 40 weeks.
birth process
comprises maturation of the fetus, relaxation of the bony pelvis and associated ligaments, softening and relaxation of the cervix, vagina, vulva and perineum, correct disposition of the fetus, contractions of the uterine myometrium and finally the only component under voluntary control, contraction of the abdominal muscles.
birth rate
the number of births during one year for the total population (crude birth rate), for the female population (refined birth rate), or for the female population of reproductive age (true birth rate). Not a term much used with reference to animals. See calving, lambing rate.
birth size
stature, including height at withers, crown to tail head length at birth.
birth weight
the weight at birth. A significant determinant of survival in any species and of the occurrence of dystocia. See also prolonged gestation.

## rate

the frequency with which an event or circumstance occurs per unit of time.

attack rate
the proportion of a population affected by a specific condition during a prescribed, usually short, period of time.
attribute-specific rate
the rate of occurrence of a specific attribute.
basal metabolic rate (BMR)
an expression of the rate at which oxygen is utilized in a fasting subject at complete rest as a percentage of a value established as normal for such a subject.
birth rate
the number of births during one year for the total population (crude birth rate), for the female population (refined birth rate), or for the female population of reproductive age (true birth rate).
case rate
morbidity rate.
case fatality rate
the number of deaths due to a specific disease as compared with the total number of cases of the disease.
cohort rate
the rate of occurrence of e.g. disease in cohorts.
death rate
the number of deaths per stated number of animals (1000 or 10,000 or 100,000) in a certain region in a certain time period.
erythrocyte sedimentation rate (ESR)
see erythrocyte sedimentation rate.
fatality rate
the number of deaths caused by a specific circumstance or disease, expressed as the absolute or relative number among individuals encountering the circumstance or having the disease.
five-year survival rate
an expression of the number of survivors with no trace of disease 5 years after each has been diagnosed or treated for the same disease.
forced expiratory flow rate (FEF)
see maximal expiratory flow rate (below).
glomerular filtration rate
an expression of the quantity of glomerular filtrate formed each minute in the nephrons of both kidneys, calculated by measuring the clearance of specific substances, e.g. inulin or creatinine.
growth rate
an expression of the increase in size of an organic object per unit of time.
heart rate
the number of contractions of the cardiac ventricles per unit of time.
incidence rate
describes the probability of a new case occurring during a stated time interval.
infection rate
percentage of the population from which a specific infectious pathogen is isolated.
rate-limiting enzymes
rate controlling enzymic steps in metabolic pathways. Often allosteric enzymes with allosteric effector sites but can be controlled through substrate availability, product removal or enzyme concentration.
maximal expiratory flow rate (MEFR)
the slope of the line connecting the points 200 ml and 1200 ml on the forced expiratory volume curve. See also pulmonary function tests. Called also FEF200-1200.
metabolic rate
an expression of the amount of oxygen consumed by the body cells.
morbidity rate
the number of cases of a given disease occurring in a specified period per unit of population.
mortality rate
death rate; the mortality rate of a disease is the ratio of the number of deaths from a given disease to the total number of cases of that disease.
reactor rate
percentage of reactors in a tested population.
respiration rate
the number of movements of the chest wall per unit of time, indicative of inspiration and expiration.
response rate
risk rate
see relative risk.
sedimentation rate
the rate at which a sediment is deposited in a given volume of solution, especially when subjected to the action of a centrifuge. See also sedimentation rate.
specific rate
expresses the frequency of a characteristic per unit of the population.
rate standardization
adaptation of a rate so that the conditions under which it occurred are comparable with those in which other rates have been estimated. There are several methods, e.g. the equivalent average death rate.
References in periodicals archive ?
These results suggest that fertility rates are influenced by changes in same-sex marriage law over time.
Due to this slow reduction in the fertility rate, the country may not be able to benefit fully from the demographic dividend, and the demographic window of opportunity is closing fast for the country,' Mapa said.
Emirati women's total fertility rate has dropped to 3.
In neighbouring countries, the total fertility rates are also low--1.
Any rapid increase in the fertility rate among the Emiratis will lead to the rise in the demographic rate, and subsequently the rise in the rate of youth who require government subsidy.
After rising from 55 births per 1,000 women to 58 between 2006 and 2008, the fertility rate has been falling since, according to estimates based on the American Community Survey (ACS).
Like other facets of globalization, low fertility rates are by no means universal: High fertility persists in sub-Saharan Africa and in parts of the Middle East, but elsewhere low fertility is more the rule than the exception.
Yet the Israeli Jewish fertility rate has risen to three children per female while the Arab fertility rate has fallen to the point where the two trend lines have converged and perhaps even crossed.
Using data for 49 Muslim-majority countries and territories, he found that fertility rates declined an average of 41 percent between 1975-1980 and 2005-2010, compared with a 33 percent decline for the world as a whole.
It is too soon to tell if the government's new policies will have any effect on fertility rates.
A study of influences on fertility rates was conducted based on data from 40 countries with a Demographic & Health Survey between 2003 and 2010.
Recent fertility rates show Maori women have an average of nearly three children each, compared to total national fertility rates of just over two," said Te Rau Matatini chief executive Trish Davis.

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