scroll down about 1/2 a page: see http://www.dol.gov/whd/fmla/fmla-faqs.htm#1
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Even if the Federal FMLA does not apply, the DC FMLA will cover you, if it has 20 or more employees working in the District. So under the DC FMLA, your employer has to provide you w/16 weeks (every 24 months) of unpaid medical leave. You may also be covered under the Pregnancy Discrimination Act (PDA) - which simply means they cannot terminate you b/c you are pregnant. The same applies under the DC FMLA, if your employer harasses you, or terminates you b/c you requested leave under the DC FMLA.
See the link below on additional information on the DC FMLA and the PDA