I live in Michigan, started a new job 11/27/2006 a week after I started I found out I was pregnant and immediatley informed my supervisor. The beginning of Jan 2006 my doctor cut my hours to 6 a day due to comlications of my pregnancy. On Jan 23 my supervisor said my note wasnt good enough and that i needed one stating when I could return to full time so on Jan 25 I gave her a doc note stating I was to work only 6 hours a day until my next appointment on feb 6. So on Jan 27 my supervisor and her boss took me to her office and informed me that I was fired becuase on my application I said I could work full time and I was not working full time. And they stated that I was still in my 90 day trial period. So my question is, what are my rights???

Unfortunatley, you had not been on the job long enough to be covered by the Family and Medical Leave Act, so the employer is under no legal obligation to provide a reduced schedule for you (wherein you'd be using FMLA leave to make up the missing hours). This is also not discriminatory if the employer would terminate any similarly situation, non-pregnant employee who also did not qualify for FMLA leave.