Yes, it unfair…and I don't make the rules, I only help you play by them. But the truth is employers often see those who work part-time as less committed and less available for possible promotion. This is an issue I see a great deal when coaching women who are returning to work after maternity leave. By all means, make sure your boss knows you are eager to be promoted if that is your goal – but you need to be realistic. If you are working part-time there is usually a trade off, normally around pay, benefits and realistically speaking, around opportunities for career progression. I do think part-time work is appropriate for many, based on what the individual wants out of life at that particular period. However, I would always caution a woman to consider it carefully. For example, think about if you really need to go part-time. Would your employer consider compressing your workweek into four 10-hour days or maybe consider a schedule whereby you work partly at home and partly in the office? Think about what is possible before assuming your only option for a better work-life balance is part-time work.