Yet another biological clock

For some reason, this post on the male biological clocks seems to draw quite a few visitors to the site. Now to add yet another "biological clock" to the table:

Canadians of childbearing age are delaying parenthood longer than any generation in history. Ten years ago, the highest fertility rate was among people between the ages of 25 and 29. Now that rate is found in the 30 to 34 age group, according to Statistics Canada data released last fall.

Reproductive technologies are helping modern couples delay their biological clocks. But their parents know there's no magic pill for aging. Some fear they'll be too old and feeble to dote on their grandkids when they finally show up.

- Excerpted from The biological clock tolls for grandparents in The Globe and Mail