As a part of a large-scale work aimed at studying the health effects of bor
on (B) in residents of a country with the world's largest supply, developme
ntal effects of B are presented. Spontaneous abortions, stillbirths, and co
ngenital malformations in addition to early infant mortality were questione
d in the field by home visits. Although the number of families so far ascer
tained is rather small, the rates related to spontaneous abortions and stil
lbirths from high B exposure vs low B exposure subpopulations revealed no d
ifferences of significance, providing no evidence that B affects human deve
lopment adversely.