It depends to a massive extent on the culture of the company and the personal attitudes of everyone from your line manager up. Some companies and individuals do have an attitude about this (despite the official HR line), while others genuinely make it as easy as possible for young mothers to keep their careers on track.To be perfectly honest, I'd say that being a woman with young children is going to have some kind of negative impact on your career progression with any employer (consulting or otherwise). This is not simply a matter of attitudes or assumptions on the part of your employers: maternity leave and other family demands mean that you're inevitably going to miss out on some promotion opportunities. That's one of the main reasons that women earn less on average than men.Having said that, it's perfectly possible to be a mother and have a successful career in consulting, just be prepared for your career to move forward a bit more slowly when your children are very young.