Mr. Babu has suggested a lot of worthy topics. Although there is a full-fledged law, the "Maternity Benefit Act," in most organizations (whether small, medium, large, Indian, or MNC), the benefits under this act are not extended to women employees. In such cases, steps are taken as soon as it is learned that a woman is pregnant to ensure that she is sent out as soon as possible. If the woman employee continues to work accidentally, she is flatly refused the benefit or threatened in soft language.
You may conduct a comparative study in various industries on the extension of the Maternity Benefit Act. However, you will have to ensure that your questionnaire covers the minutest and in-depth aspects of the benefits part of the act, as both the women employee and the employer are likely to deceive you. Pose a lot of questions, each contradictory to the other, after a certain number of questions in the questionnaire and try to get answers to each of them.
Similarly, another worthy topic is the wage difference.
Wishing you the best of luck.
If any further guidance is required, you can write to me at sangsun_sadar@yahoo.com.