The number of people who do very stupid things for little or no reason is a small, small figure
Want to bet? Come hang around MY job for a day and I'll cure you of that particular misconception.
Brad
Brad wins the prize for using the word "misconception" in a thread about miscarriage/abortion without referring to biological conception.
I don't doubt the human body has many & varied processes. I am even willing to grant that if a study is done comparing happy soon-to-be mommies who want their babies to unhappy don't-wanna-be mommies, there may be a statistically significant difference in positive outcomes*. Attributing those (possible) difference to unhappy mommy willing their baby to death** is likely not something that can be determined. Proving it would be impossible.
FWIW, my above granting the possibility is truly a gimme, as the stats point to most unwanted babies being born by younger, healthier women who have better odds than the populaton of wanna-be mommies.***
* Positive=healthy, full-term baby birthed
** As opposed to other, quantifiable acts such as diet, missing prenatal checkups, boyfriends smashing their ho's in the belly with bats, etc.
*** If you've ever seen the desperation of a couple that waited a couple years too long to try to conceive, you ain't gonna soon forget it.