| general fertility rate | A refined measure of fertility in a population; the numerator is the number of live births in a year, the denominator is the number of females of child-bearing age, usually defined as ages 15-44 (but increasingly recognised as extending to age 49). (05 Mar 2000) |
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| total fertility rate | <epidemiology> The number of children an average women would have assuming that she lives her full reproductive lifetime. (05 Dec 1998) |
| fertility | <biology> The capacity to conceive or induce conception and thus generate offspring. (12 May 1997) |
| fertility agent | The prototype conjugative plasmid associated with conjugation in the K-12 strain of Escherichia coli. Synonym: F agent, F-factor, F genote, F-genote, fertility agent, fertility factor, sex factor. (05 Mar 2000) |
| fertility agents | Drugs used to increase fertility or to treat infertility. (12 Dec 1998) |
| fertility agents, female | Compounds which increase the capacity to conceive in females. (12 Dec 1998) |
| fertility agents, male | Compounds which increase the capacity of the male to induce conception. (12 Dec 1998) |
| fertility factor | The prototype conjugative plasmid associated with conjugation in the K-12 strain of Escherichia coli. Synonym: F agent, F-factor, F genote, F-genote, fertility agent, fertility factor, sex factor. (05 Mar 2000) |
| fertility ratio | A measure of the fertility of a population based on the female population in the child-bearing age-group, defined as ages 15-49 years. (05 Mar 2000) |
| fertility vitamin | <biochemistry> Functions as an antioxidant, binds oxygen free radicals that can cause tissue damage, may also play a protective role in the coronary arteries from the damaging effects of cholesterol. (27 Sep 1997) |
| abortion rate | The number of abortions per 1000 terminated pregnancies during a given period of time. (05 Mar 2000) |
| age-specific rate | A rate for a specified age group, in which the numerator and denominator refer to the same age group. (05 Mar 2000) |
| attack rate | A cumulative incidence rate used for particular groups observed for limited periods under special circumstances, such as during an epidemic. (05 Mar 2000) |
| average flow rate | <physiology> The flow rate determined by dividing the total volume passed in a time period divided by the time period, usually quoted in mls per minute. (05 Mar 2000) |
| backup rate | A utility charge for providing occasional electricity service to replace on-site generation. (05 Dec 1998) |