Infertility is defined as a couple's inability to become pregnant
after 1 year of sex without birth control. From 10% to 15% of couples
attempting to have a child have infertility problems.
Rates of infertility (not due to surgical
sterilization) in women increase with age:1
- 7% in women ages 20 to 24
- 9% in women
ages 25 to 29
- 15% in women ages 30 to 34
- 22% in women
ages 35 to 39
- 29% in women ages 40 to 44
Rates of miscarriage (early loss of pregnancy)
also increase with age:2
- 7% to 15% in women younger than 30
- 8%
to 21% in women ages 30 to 34
- 17% to 28% in women ages 35 to
39
- 34% to 52% in women age 40 and older
The number of infertile couples seeking medical help with conception
has risen in recent years because:
- Couples are postponing child-bearing until later
in life.
- Some remarried couples begin child-bearing in their
later 30s or 40s.
- More people have had sexually transmitted
infections (STIs), which can decrease fertility.
- Some people may be
exposed to chemicals (such as lead) or environmental toxins (such as
pesticides) at work.
The number of couples seeking treatment for infertility has risen
dramatically in recent years due to:
- The development of new technologies to treat
infertility and the success of assisted reproductive
programs.
- Greater social acceptability of infertility
treatment.
- A decrease in the number of infants available in Canada
for adoption.