Standards | LG Inform Plus

Description: This is the rate of under-18 conceptions per 1,000 girls aged 15-17 years resident in the area for the calendar year. The rate includes all conceptions under 18 but uses the ONS mid-year population estimates for females aged 15-17 as a denominator to calculate the rate (as 95% of under 18 conceptions occur within this age group). Conception rate: This is defined as the number of conceptions under 18 per 1000 females aged 15-17.

Help text: Conception rate per 1,000 women at ages under 18 is taken from the ONS Conception Statistics Tables. A woman's age at conception is calculated as the number of complete years between her date of birth and the date she conceived. In many cases her birthday will occur between conception and the birth or abortion; a woman may conceive, for example, at age 19 and give birth at age 20. The conception and birth may also occur in different calendar years. For these reasons the number of conceptions to women of a given age in a given year does not match the number of maternities and abortions to women of the same given age in the same given year.

Rates for women of all ages, under 16, under 18 are based on the population of women aged 15 to 44, 13 to 15 and 15 to 17 respectively. The population figures used to calculate rates are mid-year estimates of the resident population for England and Wales based on the Census. Formally NI 112.