Has anyone asked you to leave or forced/coerced?
Can you establish it or have you captured irrefutable evidence?
In the meantime you may go thru various threads initiated by pregnant woman employees apprehending/facing various issues and pick up relevant points.
https://www.lawyersclubindia.com/forum/Resignation-after-maternity-leave-79271.asp#.UahsGdKAqWN
https://www.lawyersclubindia.com/forum/Maternity-act-74586.asp#.UXPE3qKAqWM
https://www.lawyersclubindia.com/forum/Forced-to-resign-when-enquired-about-maternity-leaves-75754.asp#.UXPC0qKAqWM
https://www.lawyersclubindia.com/forum/Maternity-leave-salary-76258.asp#.UXPDG6KAqWM
https://www.lawyersclubindia.com/forum/Meternity-leave-75127.asp#.UXPEpaKAqWM
https://www.lawyersclubindia.com/forum/Voluntary-abadonment-from-employment-82097.asp#.Ua8iV9KAqWO
https://www.lawyersclubindia.com/forum/Voluntary-abadonment-from-employment-82097.asp#.U0pY90eBmXX
https://www.lawyersclubindia.com/forum/Regarding-maternity-leave-100692.asp#.U1N830eBmXU
https://www.lawyersclubindia.com/forum/Resignation-while-on-ml-149838.asp
https://www.lawyersclubindia.com/experts/Resignation-while-on-ml-641316.asp