def read_fam(file_name):
    """Reads the FAM file to gather sample names.

    :param file_name: the ``fam`` file to read.

    :type file_name: str

    :returns: a :py:class:`dict` containing the gender of each samples.

    It uses the :py:func:`encode_gender` to encode the gender from ``1``and
    ``2`` to ``Male`` and ``Female``, respectively.

    """
    sample_names_gender = None
    with open(file_name, 'r') as input_file:
        sample_names_gender = dict([
            (i[1], encode_gender(i[4])) for i in [
                j.rstrip("\r\n").split(" ") for j in input_file.readlines()
            ]
        ])
    return sample_names_gender