In people we know who received such, the infants could not keep the formula down, nor did the mothers react well to the supplements, so they were not used.
If, however, this is common practice by welfare offices as part of prenatal/welfare services, might that extra iron be affecting the indigent population and helping continue the cycle (along with a host of social factors as well).
These aren't people who do not prize employment, and often are employed at least part time, just in jobs that do not pay well, for whatever reason (usually qualification level). However, ensuring their children are lower on the bell curve would only exacerbate the situation.
Joe, you are assuming that Kruss3's iron thesis is correct. It isn't. I can find no credible evidence to back it up. . . and what he has posted as "scientific articles" on the subject simply are not addressing that claim, and certainly are not coming to that conclusion.