So I have been in my current role not even 6 months but it's a job I have worked really hard to get. I am part of a small team as part of a larger department. The role is very niche and to be competent can take over a year of on the job training. Also major projects can rely on us being able to complete certain work within a set timescale. We had a day long team huddle today talking about our workload over the next 4-5 years, training requirements, and the possibility of more staff. We also spoke about how one of my colleagues is reaching retirement age and could leave right in the middle of our busiest time. So here is my issue, DP and I are getting married next year and would like to try for a baby soon after. Age isn't exactly on our side! I know there is no legal requirement, and DP thinks it's non of their business right now, but should I tell my boss about our plans? I don't want to leave them in a situation when the time comes, and I plan on returning to work afterwards, but if they are trying to put a case forward to senior management for extra staff should I at least give them the heads up?