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Fertility & birth rates in Guinea and Sao Tome and Principe

Updated on by Georank team

Guinea has an annual birth rate of 33.8 births per 1,000 people, compared to 28.2 for Sao Tome and Principe. The average number of children a woman is expected to have during her lifetime — the fertility rate, is 4.22 in Guinea and 3.64 in Sao Tome and Principe — 13.6% difference.

1960 vs 2023, the fertility rate has decreased by 31% in Guinea and by 41.6% in Sao Tome and Principe — in 1960, it was 6.11 and 6.24, respectively.

  • Guinea is ranked 15/196 by birth rate compared to 39/196 for Sao Tome and Principe.
  • The mean age for first-time mothers is 19.9 years in Guinea, compared to 19.4 years in Sao Tome and Principe.
  • The mean age at childbearing (for all the births, not just the first) is 28.1 in Guinea — it's 28.4 in Sao Tome and Principe.
  • Annual births per 1,000 women ages 15-19 (adolescent birth rate or teenage mother rate) is 118.6 in Guinea vs 86.2 in Sao Tome and Principe.
  • In Guinea, 24.5% of the population is composed of women of reproductive age (15-49), compared to 25.2% in Sao Tome and Principe.

Fertility rate in Guinea vs Sao Tome and Principe by year

Guinea
Sao Tome and Principe
1x
Year Fertility rate
Guinea Sao Tome
2023 4.22 3.64
2022 4.3 3.7
2021 4.4 3.76
2020 4.49 3.83
2019 4.58 3.9
2018 4.67 3.98
2017 4.79 4.07
2016 4.92 4.2
2015 5 4.35
2014 5.07 4.49
2013 5.15 4.58
2012 5.23 4.66
2011 5.34 4.72
2010 5.44 4.77
2009 5.53 4.84
2008 5.6 4.91
2007 5.66 4.96
2006 5.7 4.93
2005 5.73 4.94
2004 5.73 4.96
2003 5.74 5.01
2002 5.78 5.06
2001 5.83 5.1
2000 5.92 5.16
1999 5.99 5.23
1998 6.05 5.3
1997 6.12 5.4
1996 6.21 5.47
1995 6.29 5.55
1994 6.36 5.56
1993 6.41 5.64
1992 6.45 5.7
1991 6.48 5.77
1990 6.52 5.83
1989 6.55 5.88
1988 6.56 5.94
1987 6.57 5.99
1986 6.55 6.05
1985 6.53 6.1
1984 6.51 6.16
1983 6.49 6.22
1982 6.49 6.28
1981 6.46 6.33
1980 6.46 6.39
1979 6.45 6.43
1978 6.44 6.47
1977 6.43 6.5
1976 6.4 6.52
1975 6.37 6.53
1974 6.34 6.53
1973 6.31 6.53
1972 6.28 6.51
1971 6.26 6.49
1970 6.24 6.47
1969 6.23 6.44
1968 6.21 6.42
1967 6.2 6.39
1966 6.19 6.37
1965 6.18 6.35
1964 6.17 6.33
1963 6.15 6.31
1962 6.14 6.28
1961 6.13 6.26
1960 6.11 6.24

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

According to the latest available data on birth rates, the fertility rate in Guinea was 4.22 children per woman in 2023, compared to 3.64 in Sao Tome and Principe in 2023. The replacement level is considered to be 2.1 children per woman.

Check Guinea vs Sao Tome and Principe population clock for a dynamic visualization of the changing population.

Natural population change by year

Guinea
Sao Tome and Principe
1x
Year Natural population change
Guinea Sao Tome
2023 356,147 5,221
2022 352,517 5,102
2021 345,121 4,954
2020 342,289 4,874
2019 338,984 4,932
2018 332,585 4,957
2017 328,542 5,007
2016 324,608 5,125
2015 316,604 5,269
2014 309,539 5,381
2013 304,430 5,449
2012 298,094 5,501
2011 293,318 5,445
2010 288,512 5,391
2009 281,920 5,349
2008 274,327 5,297
2007 266,070 5,226
2006 258,518 5,057
2005 251,209 4,897
2004 242,075 4,810
2003 234,774 4,702
2002 229,022 4,591
2001 227,642 4,471
2000 227,081 4,334
1999 223,968 4,221
1998 219,385 4,120
1997 220,373 4,041
1996 214,896 3,993
1995 205,644 3,948
1994 201,439 3,860
1993 195,612 3,841
1992 189,682 3,822
1991 181,299 3,801
1990 169,926 3,719
1989 164,707 3,576
1988 159,566 3,544
1987 154,178 3,440
1986 148,137 3,180
1985 142,313 3,242
1984 136,640 3,163
1983 130,629 3,100
1982 126,831 3,047
1981 121,223 3,015
1980 117,186 2,965
1979 113,141 2,893
1978 109,415 2,800
1977 105,990 2,705
1976 102,449 2,608
1975 99,267 2,515
1974 96,315 2,422
1973 93,764 2,329
1972 91,147 2,232
1971 88,358 2,127
1970 85,418 1,980
1969 82,799 1,862
1968 79,892 1,767
1967 77,251 1,693
1966 74,748 1,642
1965 72,134 1,611
1964 69,848 1,600
1963 67,690 1,609
1962 65,672 1,625
1961 63,766 1,657
1960 61,848 1,547

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

The chart above illustrates the comparison of the absolute yearly changes in population resulting from births and deaths.

Excluding migration, the natural population change due to births and deaths from 2022 to 2023 was +2.47% in Guinea and +2.26% in Sao Tome and Principe.

For the past 10 years, the annual natural population change has been +2.6% in Guinea and +2.4% in Sao Tome and Principe.

Birth rate in Guinea vs Sao Tome and Principe by year

Guinea
Sao Tome and Principe

Annual births per 1,000 people

1x
Year Annual births per 1,000 people
Guinea Sao Tome
2023 33.8 28.2
2022 34.4 28.3
2021 35 28.5
2020 35.5 28.6
2019 36 29.2
2018 36.3 29.8
2017 36.9 30.6
2016 37.4 31.7
2015 37.8 33
2014 38 34.3
2013 38.4 35.4
2012 38.7 36.4
2011 39.2 36.8
2010 39.6 37.3
2009 39.9 37.9
2008 40.1 38.5
2007 40.2 38.9
2006 40.3 38.9
2005 40.4 39
2004 40.2 39.2
2003 40.3 39.6
2002 40.6 39.8
2001 41.3 40
2000 41.8 39.7
1999 42.4 39.4
1998 42.8 39.2
1997 43.9 39.2
1996 44.2 39.3
1995 44.3 39.5
1994 45.1 39.4
1993 45.4 39.8
1992 45.9 40.2
1991 45.8 40.7
1990 45.5 40.7
1989 46 40.9
1988 46.2 40.9
1987 46.3 41
1986 46.2 41
1985 46.1 41
1984 46 41.1
1983 45.9 41.2
1982 45.9 41.3
1981 45.7 41.5
1980 45.8 41.6
1979 45.7 41.6
1978 45.7 41.4
1977 45.7 41.3
1976 45.6 41.1
1975 45.6 40.9
1974 45.6 40.6
1973 45.6 40.3
1972 45.6 39.9
1971 45.6 39.5
1970 45.5 38.8
1969 45.5 38.2
1968 45.5 37.8
1967 45.5 37.7
1966 45.5 38
1965 45.5 38.6
1964 45.5 39.7
1963 45.6 41.1
1962 45.6 42.7
1961 45.6 44.6
1960 45.6 44.6

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

The latest reported birth rate per 1,000 people in 2023 was 33.8 in Guinea and 28.2 in Sao Tome and Principe, compared with 45.6 and 44.6, respectively, in 1960.

Birth rate data compared

Guinea Sao Tome
Fertility rate 4.22 3.64
Fertility rate rank 20/196 41/196
Birth rate 33.8 28.2
Birth rate rank 15/196 39/196
Population change due to births and deaths +356,147 +5,221
Natural population change rank 48/196 126/196
Natural population change rate +2.47% +2.26%
Population growth +2.42% +2.02%
Population growth rank 32/197 49/197
Age at first childbirth 19.9 years 19.4 years
Average age at childbearing 28.1 years 28.4 years
Annual births per 1,000 women ages 15-19 114.3 82.5
Annual births per 1,000 women ages 20-29 188.4 169.9
Annual births per 1,000 women ages 30+ 58.4 47.4
Female of reproductive age (15-49), share of population 24.5% 25.2%
Any modern method of contraceptive prevalence among married women ages 15-49 10.6% 46%
Share of births attended by skilled health staff 55.3% 96.8%
Maternal mortality per live birth 0.49% 0.08%
Neonatal mortality rate (before reaching 28 days of age) 3.03% 0.68%
Infant mortality rate (before reaching 1 year of age) 6.15% 0.94%
Mortality rate before reaching 5 years of age 9.5% 1.39%
Life expectancy 61.2 years 70.3 years

Children 0-14 years as share of population

Guinea
Factual

UN forecast
Sao Tome and Principe
Factual

UN forecast
1x
Year Young
Guinea Sao Tome
2100 20.5% 19.5%
2099 20.6% 19.6%
2098 20.8% 19.8%
2097 20.9% 19.9%
2096 21% 20%
2095 21.2% 20.2%
2094 21.3% 20.3%
2093 21.4% 20.4%
2092 21.6% 20.6%
2091 21.7% 20.7%
2090 21.9% 20.9%
2089 22% 21.1%
2088 22.2% 21.2%
2087 22.3% 21.4%
2086 22.5% 21.6%
2085 22.6% 21.8%
2084 22.8% 22%
2083 22.9% 22.2%
2082 23.1% 22.4%
2081 23.3% 22.6%
2080 23.4% 22.9%
2079 23.6% 23.1%
2078 23.8% 23.3%
2077 24% 23.5%
2076 24.1% 23.7%
2075 24.3% 24%
2074 24.5% 24.2%
2073 24.7% 24.4%
2072 25% 24.6%
2071 25.2% 24.8%
2070 25.4% 25%
2069 25.6% 25.2%
2068 25.9% 25.4%
2067 26.1% 25.6%
2066 26.4% 25.9%
2065 26.6% 26.1%
2064 26.9% 26.3%
2063 27.2% 26.5%
2062 27.5% 26.8%
2061 27.7% 27%
2060 28% 27.3%
2059 28.3% 27.5%
2058 28.6% 27.8%
2057 28.9% 28.1%
2056 29.2% 28.4%
2055 29.5% 28.7%
2054 29.8% 29%
2053 30.1% 29.4%
2052 30.4% 29.7%
2051 30.7% 30.1%
2050 31% 30.4%
2049 31.3% 30.8%
2048 31.7% 31.1%
2047 32% 31.5%
2046 32.4% 31.8%
2045 32.7% 32.1%
2044 33.1% 32.5%
2043 33.5% 32.8%
2042 33.9% 33.1%
2041 34.3% 33.4%
2040 34.7% 33.6%
2039 35.1% 33.9%
2038 35.5% 34.1%
2037 35.9% 34.4%
2036 36.4% 34.6%
2035 36.8% 34.7%
2034 37.3% 34.9%
2033 37.7% 35.1%
2032 38.1% 35.3%
2031 38.5% 35.5%
2030 38.9% 35.8%
2029 39.3% 36.1%
2028 39.7% 36.6%
2027 40% 37%
2026 40.4% 37.3%
2025 40.7% 37.6%
2024 40.9% 37.8%
2023 41.2% 38.3%
2022 41.6% 38.8%
2021 41.9% 39.4%
2020 42.1% 39.9%
2019 42.4% 40.5%
2018 42.6% 40.9%
2017 42.9% 41.4%
2016 43.1% 41.7%
2015 43.3% 41.9%
2014 43.5% 42%
2013 43.8% 42%
2012 44% 42%
2011 44.2% 42%
2010 44.5% 42.1%
2009 44.7% 42.1%
2008 44.9% 42.1%
2007 45.1% 42%
2006 45.3% 42%
2005 45.3% 42%
2004 45.3% 42.1%
2003 45.4% 42.2%
2002 45.5% 42.3%
2001 45.3% 42.5%
2000 44.9% 42.8%
1999 44.7% 43.4%
1998 44.5% 43.9%
1997 44.2% 44.3%
1996 43.9% 44.7%
1995 43.8% 44.9%
1994 43.7% 45.1%
1993 43.6% 45.2%
1992 43.5% 45.2%
1991 43.4% 45.1%
1990 43.3% 45.1%
1989 43.2% 45%
1988 43.1% 45%
1987 43.1% 44.9%
1986 43% 44.7%
1985 43% 44.5%
1984 42.9% 44.4%
1983 42.8% 44.5%
1982 42.7% 44.5%
1981 42.6% 44.7%
1980 42.4% 44.9%
1979 42.2% 45.1%
1978 42% 45.2%
1977 41.8% 45.3%
1976 41.5% 45.4%
1975 41.3% 45.5%
1974 41.1% 45.6%
1973 40.9% 45.7%
1972 40.7% 45.9%
1971 40.5% 46.1%
1970 40.4% 46.2%
1969 40.3% 45.8%
1968 40.3% 44.9%
1967 40.2% 44%
1966 40.2% 42.9%
1965 40.1% 41.6%
1964 40% 40.2%
1963 39.9% 38.5%
1962 39.9% 36.6%
1961 39.7% 34.3%
1960 39.6% 32.9%

Data sources: World Bank | Health (1960–2024, retrieved 2026-04-06); United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

Children aged 0-14 make up 40.9% of the population in Guinea and 37.8% in Sao Tome and Principe in 2024, compared to 43.3% and 45.1% respectively in 1990.

Demographics of Guinea and Sao Tome and Principe compared.

Fertility rates around the globe

1x

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

Maternal mortality chart: Guinea vs Sao Tome and Principe

Guinea
Sao Tome and Principe
1x
Year Maternal mortality per 100K births
Guinea Sao Tome
2023 494 75
2022 500 82
2021 533 98
2020 528 92
2019 548 95
2018 560 100
2017 582 110
2016 606 119
2015 642 128
2014 664 138
2013 682 150
2012 703 158
2011 728 164
2010 750 170
2009 766 172
2008 772 174
2007 802 174
2006 825 177
2005 843 181
2004 869 177
2003 892 178
2002 916 179
2001 946 178
2000 951 180
1999 960 179
1998 971 175
1997 994 173
1996 1,010 171
1995 1,042 172
1994 1,081 168
1993 1,094 166
1992 1,124 164
1991 1,143 166
1990 1,162 164
1989 1,188 167
1988 1,202 157
1987 1,218 161
1986 1,234 175
1985 1,248 159

Data sources: World Bank | Gender (1985–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 494 deaths per 100,000 live births in Guinea, compared to 75 deaths in Sao Tome and Principe.

Under-five mortality rates

Guinea
Sao Tome and Principe

Probability that a newborn baby will die before reaching age five

1x
Year Under 5 mortality rate
Guinea Sao Tome
2023 9.5% 1.39%
2022 9.78% 1.46%
2021 10.1% 1.53%
2020 10.3% 1.6%
2019 10.6% 1.7%
2018 10.8% 1.81%
2017 11% 1.95%
2016 11.2% 2.11%
2015 11.4% 2.31%
2014 11.6% 2.54%
2013 11.7% 2.77%
2012 11.8% 3.04%
2011 12% 3.33%
2010 12.2% 3.63%
2009 12.4% 3.95%
2008 12.7% 4.3%
2007 12.9% 4.68%
2006 13.3% 5.11%
2005 13.7% 5.56%
2004 14.1% 6.05%
2003 14.6% 6.57%
2002 15.2% 7.1%
2001 15.9% 7.66%
2000 16.5% 8.21%
1999 17.2% 8.76%
1998 17.9% 9.26%
1997 18.6% 9.73%
1996 19.3% 10.1%
1995 20% 10.4%
1994 20.7% 10.7%
1993 21.4% 10.8%
1992 22.1% 10.9%
1991 22.7% 10.9%
1990 23.3% 10.8%
1989 23.9% 10.7%
1988 24.4% 10.6%
1987 24.8% 10.4%
1986 25.3% 11.4%
1985 25.8% 9.99%
1984 26.2% 9.77%
1983 26.7% 9.56%
1982 27.2% 9.37%
1981 27.7% 9.21%
1980 28.2% 9.1%
1979 28.7% 9.02%
1978 29.2% 8.96%
1977 29.7% 8.93%
1976 30.1% 8.89%
1975 30.6% 8.85%
1974 30.9% 8.79%
1973 31.3% 8.73%
1972 31.6% 8.67%
1971 31.9% 8.63%
1970 32.2% 8.64%
1969 32.5% 8.71%
1968 32.8% 8.85%
1967 33.1% 9.04%
1966 33.4% 9.29%
1965 33.6% 9.56%
1964 33.9% -
1963 34.2% -
1962 34.4% -
1961 34.7% -
1960 35% -

Data sources: World Bank | Health (1960–2023, retrieved 2026-04-06).

GeoRank.org/birth-rate/guinea/sao-tome-and-principe | CC BY

The chance that a newborn baby will die before reaching age five is 9.5% in Guinea and 1.39% in Sao Tome and Principe. Above is a chart with historical data on under-five mortality rates.

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Data sources:

  1. World Bank | Health (1960–2024, retrieved 2026-04-06)
  2. United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10)
  3. Central Intelligence Agency (CIA) (2025, retrieved 2026-02-20)

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