Is it possible that the baseline is the same as the mother ion in the mass spectrum?????
No. The baseline is the background noise which is always present. If the parent ion is present (terminology is now parent or precursor ion) it will produce a peak at the relevant mass in your mass spectrum.
In principal, I agree with Valerie Steele . However, it greatly depends on the ionization technique. If you use for instance electron impact, some molecules will almost fully fragment upon ionization. This means that you may not be able to see the precursor as the signal is too low to discriminate from the baseline noise. If that is the case, I would strongly recommend looking up your compound on NIST to see if there is a reference spectrum available. If the precursor is significant here, something else may be the issue.
Note that "mass spectroscopy" must not be used, use mass spectrometry instead. Also "electron impact" is not recommended, "electron ionization" is the right term (IUPAC recommendations 2013).
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