2.30 Nigeria

2.30.1 Total adolescent births

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Total adolescent births per woman

	Country	5-year birth cohort	Unweighted cases	Total adolescent births
		1940 1995	1467 25311	0.728542871957277 1.153270495378550
1	Nigeria	1940	1,467	0.80
2	Nigeria	1945	1,777	1.02
3	Nigeria	1950	2,949	1.07
4	Nigeria	1955	4,141	1.15
5	Nigeria	1960	7,421	1.06
6	Nigeria	1965	11,202	0.95
7	Nigeria	1970	16,443	0.84
8	Nigeria	1975	20,055	0.82
9	Nigeria	1980	25,311	0.79
10	Nigeria	1985	23,017	0.82

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2.30.2 Total adolescent births by age at first birth

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Total adolescent births per woman by age at first birth

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Total adolescent births
		1940 1995		112 5698	1.062558218750480 3.121370013470690
1	Nigeria	1940	14 years and younger	112	2.83
2	Nigeria	1940	15-17 years	293	1.91
3	Nigeria	1940	18-19 years	231	1.09
4	Nigeria	1945	14 years and younger	185	3.05
5	Nigeria	1945	15-17 years	456	2.00
6	Nigeria	1945	18-19 years	275	1.12
7	Nigeria	1950	14 years and younger	399	2.92
8	Nigeria	1950	15-17 years	740	1.91
9	Nigeria	1950	18-19 years	463	1.09
10	Nigeria	1955	14 years and younger	486	3.12

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2.30.3 Contribution to total adolescent fertility by cohort and age at first birth

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Contribution to total adolescent fertility by cohort and age at first birth

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Proportion
		1940 1995		112 5698	0.165409421378072 0.566272658408753
1	Nigeria	1940	14 years and younger	112	0.30
2	Nigeria	1940	15-17 years	293	0.47
3	Nigeria	1940	18-19 years	231	0.23
4	Nigeria	1945	14 years and younger	185	0.30
5	Nigeria	1945	15-17 years	456	0.53
6	Nigeria	1945	18-19 years	275	0.17
7	Nigeria	1950	14 years and younger	399	0.41
8	Nigeria	1950	15-17 years	740	0.43
9	Nigeria	1950	18-19 years	463	0.17
10	Nigeria	1955	14 years and younger	486	0.34

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2.30.4 Contribution to total adolescent fertility by age at first birth (all cohorts)

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Contribution to total adolescent fertility by age at first birth (all cohorts)

	Country	Age at first birth	Unweighted cases	Proportion
			11012 31584	0.204499316404843 0.516143305991981
1	Nigeria	14 years and younger	11,012	0.28
2	Nigeria	15-17 years	31,584	0.52
3	Nigeria	18-19 years	21,720	0.20

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2.30.5 Completed fertility by motherhood entry age

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Children ever born by motherhood entry age, women aged 40 and older

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Number of children
		1940 1975		56 8509	4.572095354028070 8.931356951077850
1	Nigeria	1940	All mothers	797	6.09
2	Nigeria	1940	In adolescence	323	7.19
3	Nigeria	1940	After adolescence	474	5.26
4	Nigeria	1945	All mothers	678	7.01
5	Nigeria	1945	In adolescence	330	7.88
6	Nigeria	1945	After adolescence	348	5.98
7	Nigeria	1950	All mothers	154	7.85
8	Nigeria	1950	In adolescence	98	8.93
9	Nigeria	1950	After adolescence	56	5.87
10	Nigeria	1955	All mothers	1,133	7.22

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2.30.6 Difference in completed fertility between adolescent and non-adolescent mothers

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Difference in completed fertility between adolescent and non-adolescent mothers

	Country	5-year birth cohort	Difference in number of births
		1940 1975	1.898510225562870 3.065727930773370
1	Nigeria	1940	1.92
2	Nigeria	1945	1.90
3	Nigeria	1950	3.07
4	Nigeria	1955	1.96
5	Nigeria	1960	2.28
6	Nigeria	1965	2.34
7	Nigeria	1970	2.40
8	Nigeria	1975	2.68

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2.30.7 Contribution of adolescent fertility to total fertility by cohort

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Contribution of adolescent fertility to total fertility by cohort

	Country	5-year birth cohort	Unweighted cases	Proportion
		1940 1975	154 8509	0.126687441944291 0.203214232451877
1	Nigeria	1940	797	0.13
2	Nigeria	1945	678	0.14
3	Nigeria	1950	154	0.20
4	Nigeria	1955	1,133	0.17
5	Nigeria	1960	4,548	0.15
6	Nigeria	1965	6,649	0.15
7	Nigeria	1970	8,509	0.13
8	Nigeria	1975	2,598	0.13

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2.30.8 Mean age at first birth

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Mean age at first birth, women with first birth before age 30

	Country	5-year birth cohort	Unweighted cases	Mean age
		1940 1985	1383 15279	19.68450299346190 21.38914787528690
1	Nigeria	1940	1,383	21.39
2	Nigeria	1945	1,707	20.00
3	Nigeria	1950	1,770	19.93
4	Nigeria	1955	2,206	19.68
5	Nigeria	1960	4,875	20.36
6	Nigeria	1965	9,137	20.63
7	Nigeria	1970	15,279	21.04
8	Nigeria	1975	15,215	21.02
9	Nigeria	1980	12,878	21.05
10	Nigeria	1985	3,537	20.94

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2.30.9 Adolescent parity progression ratios

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Adolescent parity progression ratios

	Country	5-year birth cohort	Progression ratio from	Unweighted cases	Ratio
		1940 1995		6 11483	0.139504814755358 0.602757720679350
1	Nigeria	1940	none to 1st birth	636	0.45
2	Nigeria	1940	1st to 2nd birth	311	0.50
3	Nigeria	1940	2nd to 3rd birth	122	0.41
4	Nigeria	1940	3rd to 4th birth	33	0.33
5	Nigeria	1940	4th to 5th birth	8	0.18
6	Nigeria	1945	none to 1st birth	916	0.53
7	Nigeria	1945	1st to 2nd birth	534	0.59
8	Nigeria	1945	2nd to 3rd birth	225	0.41
9	Nigeria	1945	3rd to 4th birth	71	0.35
10	Nigeria	1945	4th to 5th birth	22	0.30

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2.30.10 Adolescent parity progression ratios by age

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Adolescent parity progression ratios by mother's age at first birth

	Country	5-year birth cohort	Age at first birth	Progression ratio from	Unweighted cases	Ratio
		1940 1995			0 5698	0.000000000000000 0.935792293006710
1	Nigeria	1940	14 years and younger	none to 1st birth	112	0.09
2	Nigeria	1940	15-17 years	none to 1st birth	293	0.20
3	Nigeria	1940	18-19 years	none to 1st birth	231	0.17
4	Nigeria	1940	14 years and younger	1st to 2nd birth	93	0.86
5	Nigeria	1940	15-17 years	1st to 2nd birth	198	0.69
6	Nigeria	1940	18-19 years	1st to 2nd birth	20	0.09
7	Nigeria	1940	14 years and younger	2nd to 3rd birth	61	0.71
8	Nigeria	1940	15-17 years	2nd to 3rd birth	60	0.29
9	Nigeria	1940	18-19 years	2nd to 3rd birth	1	0.03
10	Nigeria	1940	14 years and younger	3rd to 4th birth	25	0.46

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2.30.11 Rapid Repeat Birth probability

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Likelihood that an adolescent mother has a rapid repeat birth

	Country	5-year birth cohort	Likelihood
			0.285528821531803 0.365451752884682
1	Nigeria	1940	0.31
2	Nigeria	1945	0.37
3	Nigeria	1950	0.36
4	Nigeria	1955	0.36
5	Nigeria	1960	0.35
6	Nigeria	1965	0.34
7	Nigeria	1970	0.32
8	Nigeria	1975	0.31
9	Nigeria	1980	0.31
10	Nigeria	1985	0.31

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2.30.12 Rapid Repeat Birth proportion

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Proportion of nonfirst adolescent births that are rapid repeat births

	Country	5-year birth cohort	Unweighted cases (non-first adolescent births)	Proportion
		1940 1995	479 8736	0.459718255085953 0.530217265005024
1	Nigeria	1940	479	0.46
2	Nigeria	1945	857	0.53
3	Nigeria	1950	1,465	0.53
4	Nigeria	1955	2,237	0.50
5	Nigeria	1960	3,740	0.49
6	Nigeria	1965	4,844	0.50
7	Nigeria	1970	6,135	0.48
8	Nigeria	1975	7,317	0.48
9	Nigeria	1980	8,736	0.49
10	Nigeria	1985	7,988	0.49

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