MHLU - Health Status Resource

Pregnancy and Fertility Rates

Pregnancy and Fertility Rates

Key Findings: 
  • Pregnancy rates in Middlesex-London have increased slightly from 2001 to 2009 and are consistently lower than those in Ontario and similar to the Peer Group (Fig. 9.5).
  • Fertility (live birth) rates in Middlesex-London were for the most part slightly lower than those for Ontario and similar to the Peer Group (Fig. 9.9).
  • Fertility rates in Middlesex-London increased slightly since 2000 and reached Ontario rates by 2009 (Fig. 9.9).
  • The average number of children per female ages 15 to 49 in Middlesex-London in 2007 was 1.5 compared to 1.6 for Ontario and the Peer Group (Fig. 9.11).
  • Trends and rates of pregnancy varied significantly based on age of mother (Fig. 9.6 and Fig. 9.8).
  • Pregnancy and fertility rates across age groups in Middlesex-London followed the trend seen for Ontario but with lower rates in every age group except for ages 15-19 where fertility rates were higher than Ontario and pregnancy rates similar to Ontario (Fig. 9.6 and Fig. 9.10).
  • Compared to the Peer Group, females in Middlesex-London tended to be pregnant or give birth at older ages peaking at ages 30 to 34 rather than 25 to 29 as with the Peer Group (Fig. 9.6).
  • About 32 for every 1000 females ages 15 to 19 in Middlesex-London were pregnant in 2009 (Fig. 9.7).
  • Pregnancy rates for teens (age 15-19) in Middlesex-London are similar to those for Ontario and slightly lower than those for the Peer Group over time (Fig. 9.7).
  • Teen pregnancy rates in Middlesex-London and the Peer Group mirrored the slight downward trend shown for Ontario which fell by 20% from 2001 to 2009 (Fig. 9.7).
  • The 30 to 34 age group rates rose from 2001 to 2009 by 20%, replacing the 25 to 29 age group as the age group with the highest rate. The 25 to 29 age group rates fell by 7% over the same time period (Fig. 9.8).
  • The third and fourth highest pregnancy rates were for age groups 20 to 24 and 35 to 39 at 66.1 and 52.7 per 1000 females in their age groups, respectively, in 2009. The 20 to 24 age group fell by 11% and the 35 to 39 age group rose by 24% from 2001 to 2009 (Fig. 9.8).
  • Although the 40 to 44 age group had the second lowest pregnancy rate at 10.7 in 2009, rates for this age group showed the most growth by 47% from 2001 to 2009 (Fig. 9.8).
  • Middlesex-London shows a slight increase in pregnancy and fertility rates over time, and more so for pregnancy rates, whereas Ontario shows little change (Fig 9.12).
  • The highest fertility rates were for age groups 25 through to 34 (Fig. 9.10).
  • In 2009, the pregnancy rate in Ontario was 33% higher than its fertility rate, whereas the pregnancy rate in Middlesex-London was 25% higher than its fertility rate. The difference is likely a reflection of a lower rate of therapeutic abortions for Middlesex-London females compared to their Ontario counterparts (Fig. 9.12).
Interpretive Notes

The pregnancy rates presented are estimated by adding the number of therapeutic abortions, stillbirths and live births amongst females of childbearing years. Fertility rates, on the other hand, only reflect live births within this population. Differences between values for these two kinds of rates for the same time period and geography are largely explained by differences in the number of therapeutic abortions.

How this Indicator was Calculated: 
Ontario Public Health Standard: 

Population Health Assessment and Surveillance Protocol - Section 1

Jargon Explained

Pregnancy Rate

The number of in-hospital deliveries of live births and stillbirths, plus the number of therapeutic abortions, among females aged 15-49 years per 1,000 females aged 15-49.

General Fertility RateĀ 

The number of live births during a given period over the female population aged 15-49.

Age-Specific Fertility Rate

The number of live births to women in a given age group over the number of women in that age group.

Total Fertility Rate

The average number of children that would be born per woman if all women lived to the end of their childbearing years and bore children according to the age-specific fertility rates for that area and period.