Any other working moms feel the double standard of working and being responsible for the daycare pickup?

I was called into a meeting this afternoon, around 4:45, to discuss a huge project we're working on. The meeting was with 3 of the company owners, my immediate supervisor, and a colleague. All men.

At 5:20, just as we seemed to be getting somewhere with the meeting, I had to leave because I am responsible for daycare pickup (my husband works on the other side of town and didn't get enough notice to leave early to do the pickup).

I'm sure I should just be pleased that I was at least invited to the meeting, but I absolutely HATE that I had to run out like that.