Births and deaths have an impact on the national and local populations. The latest births and deaths figures from the Office for National Statistics (released July 2018), show that on a basic count level the Lancashire-12 area continues to register more live births than deaths each calendar year, but the total live birth count shows that the number of births recorded in 2017 was the lowest since 2006. There are some notable differences between the local authorities, with Fylde, Lancaster, Ribble Valley, West Lancashire and Wyre all recording more deaths than births in 2017. Of the two unitary authorities, only Blackpool records more deaths than live births.
The number of births in a given year is dependent on the number of women of childbearing age (15–44 years) and on fertility rates in that year, as well as annual changes in the size and age-structure of the female population, alongside migration and mortality.
The general fertility rate (GFR) is the total number of live births per 1,000 women of reproductive age (15 to 44 years) in a population per year. This is a more refined way to measure fertility in a population, rather than crude birth rate because the GFR accounts for the female population aged 15 to 44 years as the denominator, rather than the whole population. Despite this, differences in GFR may be due to underlying variations in the age structure of the female population over time or across populations of interest.
The total fertility rate (TFR) is the average number of live children that a group of women would bear if they experienced the age-specific fertility rates of the calendar year in question, throughout their childbearing lifespan.
Studies suggest that without inward migration, population size decreases and population ageing accelerates when the TFR falls below 2.1 children per female[i]. This concept is known as replacement fertility and refers to the level of fertility required to ensure a population replaces itself in size.
There are also individual births and deaths graphs for every district in the Area Profiles section of Lancashire Insight.
Further analysis and data
Births and deaths (XLSX 121 KB)
Page updated October 2018