According to a recent clarification issued by the government, an employee who is on maternity leave as of 1st April 2017 is also eligible for the extended leave, i.e., 26 weeks of leave. Since your date of childbirth is on 29th March 2017, naturally, you should be on maternity leave as of 1st April 2017, and as such, you will benefit from 26 weeks of leave, deducting the number of days already taken in your current spell of maternity leave.
Please find the attachment.
Madhu.T.K