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# Multilingual Demographic Dictionary, second unified edition, English volume

# Marriages of completed fertility

**Marriages of completed fertility {{{CompleteIndexTerm}}}**

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{{Lang section -{{{Lang}}}}} | [[:{{{Lang}}}-:63#637|{{Lang name -{{{Lang}}}}} 637]] {{{content}}} |

Censuses and surveys may provide information on fertility when they include questions on the number of children born to enumerated women or couples, either during the **current marriage** ^{1}, or overall. The **mean number of children ever born per woman** ^{2} or **average parity** ^{2} can be computed. The number of children per couple is sometimes called **average family size** ^{3}. It is also possible to calculate the **mean number of births per marriage** ^{4}. Special attention is paid to **completed fertility of marriages** ^{5}, those in which the wife had reached the end of the reproductive years before the marriage was dissolved. The **final parity** ^{6} or **completed parity** ^{6}, i.e., the mean number of children per woman past the childbearing age, is not very different from *completed fertility* (636-4). The tabulation of final parity or completed fertility by number of children serves to compute series of **parity progression ratios** ^{7}; these are fractions whose denominator is the number of women with *n* children, and whose numerator is the number of women with *n* + 1 children. Special studies yield information on **family formation** ^{8} and the **family life cycle** ^{8}. Among those, **frequency of premarital conceptions** ^{9★}, *birth intervals* (612-1) and the **age at the birth of the last child** ^{10} for women of completed fertility are of particular interest.
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