1.   But as Sulloway was plugging away, other scientists were busy debunking birth order.

2.   In all countries, children of high birth order have comparatively poor survival chances.

3.   Parasitic infections were high regardless of family size and appeared unrelated to birth order.

4.   Still birth ratios also increase with birth order in each birth interval category.

5.   This group of work-inhibited students was quite evenly divided in terms of birth order.

6.   Though maternal age and birth order have an independent effect on the viability of the fetus, that act together.

7.   Thus, the effect of birth order on child survival also resembles the probable effect of family size.

8.   And if handedness is clearly tied to birth order in chimps, it could throw a monkey wrench into theories of handedness in humans as well.

9.   And board nominating committees, too, might do well to include people who vary by birth order, not just industry background and expertise, he said.

10.   Anthropologists have also learned from oral tradition that these societies had a social structure with status ranked by birth order.