This study is based on fieldwork that was conducted in a Gypsy and a H
ungarian non-Gypsy population. The main goal of our study was to exami
ne the primary factors having the largest impact on Gypsy fertility. C
ontrary to widespread views based mainly on anecdotal evidence-level o
f education, occupational status, or use of contraceptive pills does n
ot seem to have a profound influence on the number of births. In fact,
the evidence suggests that the extensiveness of kinship networks and
the degree of the relatives' assistance with childcare are most strong
ly predictive of fertility in the Gypsy population. Our data proved to
be highly supportive of the evolutionary hypothesis that personal ser
vices through kinship networks are particularly valuable resources, ac
counting for the higher fertility in more traditional societies compar
ed to technologically more advanced ones. (C) 1998 Elsevier Science In
c.