Rates of Spontaneous Abortion and Air Pollution.

[erronis]

1. You always get my brain a-churning. That's a good thing except while trying to sleep.

In my limited experience as a participant in the attempts to create a new human child, the 30% SAB seems about right. Of course there are some women who just can't carry a fetus to birth, but there are many who try more than once and succeed eventually. Each miscarriage is heart-rending.

I wonder what is the percentage of still births to non-human species. I would think that other species have many unsuccessful births, also.