what about appointment letter? is it given to you or not? if no then you will have to prove that you are employee of the company by the way of pay slips, bank statements, other letters etc.
They can not terminate you during pregnancy. they will have to prove that your performance is not good. they will have to give you chance to improve on your performance. if it is written in appointment letter that they can terminate you at any time during Probation then also they will have to give you all benefits under the maternity Benefit act. because performance and maternity benefit are separate things.
(2) (a) The discharge or dismissal of a woman at any time during her pregnancy, if the woman but for such discharge or dismissal would have been entitled to maternity benefit or medical bonus referred to in section 8, shall not have the effect of depriving her of the maternity benefit or medical bonus:
Provided that where the dismissal is for any prescribed gross misconduct, the employer may, by order in writing communicated to the woman, deprive her of the maternity benefit or medical bonus or both.
Performance related problem is not a gross misconduct. and so they can not deprive you from maternity benefit.
[2*[(b) Any woman deprived of maternity benefit or medical bonus,or both, or discharged or dismissed during or on account of her absence from work in accordance with the provisions of this Act, may,within sixty days from the date on which order of such deprivation or discharge or dismissal is communicated to her, appeal to such authority as may be prescribed, and the decision of that authority on such appeal, whether the woman should or should not be deprived of maternity benefit or medical bonus, or both,or discharged or dismissed shall be final.]
appellate authority for this act is Inspectors of Labour and Regional Deputy Commissioners of Labour.