Immigration from developing countries to Europe has greatly increased durin
g the last few years. Very little information is available on children who
immigrated with their biological family, thus this paper deals only with ch
ildren immigrating by adoption. In recent years some studies have shown an
increased incidence of precocious puberty among adopted children, but infor
mation on this issue is scanty. Several hypotheses have been put forward to
explain precocious puberty in adopted children, including nutritional, eth
nic and/or emotional factors. Untreated precocious puberty is associated wi
th short stature and has social and psychological consequences in addition
to those related to adoption. Therefore, indications for therapy need to be
carefully planned. In adopted children age estimation is a possible source
of error in timing of puberty as date of birth is often missing or inaccur
ate, Thus each child must be carefully evaluated.