Clarification of Answer by
01 Feb 2006 20:12 PST
Wow!. Thanks...for being so understanding, and for everything else.
As far as anything resembling 'trends' information, the most complete
statistics come out of the data from the developing world:
Infecundity, Infertility, and Childlessness in Developing Countries
There's probably a lot more numbers, details, analysis in this report
than you're looking for, but the key table of interest, as far as
trends go, is Table 11 of the report:
Trends in the proportion of currently married women who have no living
children and who have had no fertile pregnancies
The table compares data from most recent surveys, to older data. In
general, infertility rates are declining -- that is, more families
that want to have have babies are able to do so.
Reading the table can be tricky, but here's what the data for
Indonesia look like, just to give you an example:
Data is shown for four survey years over a ten year period: 1987,
1991, 1994, and 1997.
Over that span, the column over on the left shows the rate of "No
fertile pregnancies" for two age groups: 40-44 year old women, and
25-49 year old women.
For both those groups, the infertility rate declined. For instance,
in the older group, rates were:
1987 -- 3.6
1991 -- 3.8
1994 -- 2.8
1997 -- 2.9
That is, in 1987, 3.6% of the women in Indonesia (in the 40-44 age
group were experiencing infertility, but this percentage dropped to
2.9% in 1997.
Oddly, the data seem to be much more comprehensive in the developing
world, than in the US or other 'first world' countries. Typical is
this sort of information from the CDC, the nation's authoratative
source of health-statistics:
--Number of women ages 15-44 with impaired ability to have children: 6.1 million
--Number of women who've ever used infertility services: 9.2 million
--Number of married couples that are infertile: 2.1 million
--Number of women using infertility services: 9.3 million
Source: Fertility, Family Planning, and Women's Health: New Data from
the 1995 National Survey of Family Growth, table 49
You can see, the data come from a 1995 survey, and there doesn't seem
to be much in the way of more recent information, or older information
to compare the statistics to.
Hope that all helps.
If there's anything else I can do for you, just holler.