I would say that now that you have been back 3 months, it is the right time to address this head on with them, and make a direct comparision between your own caseload and that of the new recruit. How does your seniority compare with his? You may become vulnerable to dismissal on performance grounds, or redundancy, if you let this situation drift on. I think that if your requests for more work have not been in writing, you need to put your concerns in writing now, if possible involving HR, but in a softly softly way, with the tone of, "I just can't understand why this pattern is occurring, when I am so keen and enthusiastic and committed to my job," rather than a whingeing, potential sex discrimination litigant tone. Two maternity leaves in three years is a big chunk of time away. What steps were taken to reintegrate you and build up your practice when you returned? Did you get back your old clients each time? Do you mind if I ask whether you have now completed your family?