Laid off after maternity leave, do I have any recourse?

I was just laid off from my job with a major telecom company. I have worked there for 5 years with excellent performance reviews and sales results every single year. I was given notice of my layoff without explanation. I was the only person in my department laid off and I was also the only person out on maternity leave for 10 weeks this year. I feel that I was discriminated against due to my pregnancy and leave. Do I have any recourse?