  We study the prospects for extracting detailed statistical properties of the
neutral Hydrogen distribution during the era of reionization using the
brightness temperature fluctuations from redshifted 21 cm line emission.
Detection of this signal is complicated by contamination from foreground
sources such as diffuse Galactic synchrotron and free-free emission at low
radio frequencies, extragalactic free-free emission from ionized regions and
radio point sources. We model these foregrounds to determine the extent to
which 21 cm fluctuations can be detected with upcoming experiments. We find
that not only the level of correlation from one frequency to another, but also
the functional form of the foreground correlations has a substantial impact on
foreground removal. We calculate how well the angular power spectra of the 21cm
fluctuations can be determined. We also show that the large-scale bias of the
neutral Hydrogen gas distribution with respect to the density field, can be
determined with high precision and used to distinguish between different
reionization histories.
