Sorry but I can't agree with this.

You are a mother first and foremost. Jobs can come and go, but your family will always be there.  What 'business' people fail to recognise is that for some people work and careers are not the 'be all and end all" (ie there's more to life than work).

I also think that some people fail to see the basic biological differences in women - we have the babies and worry about them, we sometimes get PMS etc - and that however we try, it does affect our work performance.

That said, it shouldn't give anyone carte blanche to spend all day on personal calls etc, but it must be remembered that babies/children worries/PMS are not problems that can be left at home or a pill taken to make them go away while you are at work.  A little understanding and patience are needed - I get so angry with people who can't see what the problem is (ie you're worried about your kids) because they don't suffer the same problems.

Let's all remember that however much you love your job, family has to come first, and if that means a little patience and understanding from your boss to make your job easier so that you can perform better, so be it.