This article couldn't have said it better.

I've been a mom for almost a year now and I'm terrible at keeping in touch.

I don't return calls and I don't check my voicemail.

If you reach me, you have.  If you haven't, sorry.

I'm a bit better with texting and emails.

But even those leave conversations unfinished with responses coming hours and sometimes days late.

I know my mom friends understand but I worry others think worse.

To my friends with out kids, here you go.

My excuse, my defense, my explanation.