For maternity benefit employee has to make a Payment of contribution for 70 days in immediately proceeding one or two consecutive contribution periods.
So as your wife is covered from April 2017, she will definitely be entitled for the benefit of maternity leave for 26 weeks with 100% of daily average wages. Please reach your ESI hospital with the card she has got for ESI registration and start taking treatment. The doctor will prescribe when the leaves be required and issue her the entitlement slip
29th November 2017 From India, New Delhi
29th November 2017 From India, Mumbai