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Mainstage Variable

zygosity21

multiple birth sibling no. 1: number in hhgrid of first potential twin

Datafile

child

Index term

Fertility

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	9475	99.98%
	Total	9477	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	7112	99.92%
	Total	7118	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	7632	99.97%
	Total	7634	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	8554	99.84%
	Total	8568	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	9549	99.9%
	Total	9559	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	10300	99.94%
	Total	10306	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	11532	99.86%
	Total	11548	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	12560	99.94%
	Total	12568	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	11530	88.59%
	Total	13015	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	12879	99.85%
	Total	12898	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	13794	97.5%
	Total	14148	100.0%

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The Study is led by a team at the Institute for Social and Economic Research (ISER) at the University of Essex.