I've just had an interview and been offered a job on promotion internally. I am 15 weeks pg and will be about 21w when I start. I did not make any allusion to this in the interview
Before accepting the offer, I called HR to ask about how they apply the maternity policy for newly promoted staff... "just in case...at some point..." They could not give me a straight answer.
The bit of the policy I was concerned about states that if you take anything more than ordinary maternity leave (26weeks) you come back into your post on same T&Cs, or you are offered something else at the same approximate grade - in this job the promotion route is not 'substantive' and therefore the 'something else' would be impossible to identify, so I would be likely to end up down a grade. I would in that instance go straight to a grievance/ tribunal etc.
What I had to do next was call the line manager and tell him I'd be accepting, but would be taking 6 months ML from Sept. I felt like I was inviting him to put his foot in it and I felt bad about that. He could not have been more reassuring and said it did not change the fact I was the best candidate for the job, we would just have to adjust how the team as a whole planned its output over the coming year.
The HR policy, I now think, is written so that anyone interested in their career only takes 6 months off for mat leave. Those 6 are at full pay, which is great, but the cliff edge to "potentially lose hold on your whole career plan" is very very stark.
I am surprised Xenia has not commented yet on this thread (and I do not mean that sarcastically). Before she does, I will say that the reason I can be confident that I will only need my 6 months ML is that my DH (actually without me asking him to) intends to make my career the priority one of our family. He has, coincidentally, just heard he is likely going to be made redundant (he currently earns 50% more than me) but ensuring that he does all the overnight duty as I go back to work and prove myself again will be another way to show my work (I mean my team and peers, not HR who only see me as a line of data) that I am committed.
So in answer to the question, NO I think HR definitely should not start that conversation. There are so many more influences on 'how you are going to perform as an employee' than whether you have borne or will bear children, I would frankly be insulted. When I am at work I want to be judged equally to the person who has only a cat to feed in the evenings, and the person up all night with an elderly incontinent parent, and the person running five step/adoptive/children between dance and karate clubs six nights a week.