Length of a generation

Length of a generation (LENGTH of a generation)

Translation
Section	English 713	Arabic 713	Czech 713	German 713	Spanish 713	Finnish 713	French 713	Italien 713	[[pl-I:71#713\|Template:Lang name -pl 713]]	Portuguese 713	Russian 713
713-1	length of a generation —mean interval between successive generations	مدة الجيل	průměrná délka generace	durchschnittliche Generationsdauer —durchschnittlicher Generationsabstand	duración media de una generación —intervalo entre generaciones sucesivas	sukupolvien keskietäisyys —sukupolven keskimääräinen pituus	durée moyenne d’une génération —intervalle entre générations successives	durata media di una generazione —intervallo medio fra generazioni successive	długość trwania generacji —odstęp czasu między kolejnymi generacjami	GERAÇÃO duração —INTERVALO médio entre gerações sucessivas	Длительность воспроизводственного цикла —Средняя длина поколения —Интервал между смежными поколениями
713-2	average age of mother	عمر المتوسط للأمهات	průměrný věk rodiček	durchschnittliches Alter der Mütter	edad media de las madres	synnyttäjien keski-ikä	âge moyen des mères	età media delle madri	średni wiek matek	IDADE média das mães	Средний возраст матери
713-3	hypothetical cohort —fictitious cohort —synthetic cohort	أجيال وهمية—أجيال خيالية	generace hypothetická —generace fiktivní	fiktive Generation	generaciones hipotéticas —generaciones ficticias	hypoteettinen sukupolvi	génération hypothétique —génération fictive	generazione fittizia —generazione ipotetica	generacje hipotetyczne —generacje fikcyjne	GERAÇÃO hipotética —GERAÇÃO fictícia —GERAÇÃO sintética	Гипотетический контингент —Фиктивный контингент

The net reproduction rate (711-3) and the intrinsic rate of natural increase (703-1) are closely related to one another. The net reproduction rate will measure the increase of the stable population (703-2) implied by the given age-specific fertility and mortality rates (401-2), over a period equivalent to the length of a generation¹ or the mean interval between successive generations¹. This length of a female generation is approximately equal to the average age of mothers² giving birth to live daughters, provided current age-specific fertility and mortality rates prevail. Replacement indices are generally current indices (cf. 153-4) which relate to hypothetical cohorts³, fictitious cohorts³ or synthetic cohorts³.
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