Send a SASE with your followup, of course, and be prepared to wait. The major women's magazines DO tend to take a long time to respond, simply because they receive so many queries. I am a little hesitant about sending multiple queries, although I'm aware that this is becoming more acceptable. Some magazines clearly state their policy on this, while others make no mention of it. My fear is that I will get two offers, although that may be a bit presumptuous at this stage of the game.
Different folks have different opinions on that topic.
My own opinion is that since most editors really do hate simultaneous submissions, I still consider it a bad idea. I'm sure I'll get some disagreement here. Some believe that simsubs are necessary to survive. I understand this reasoning, but I still don't believe it's a good idea. It is to find an editor who likes your work and will want to work with you again, giving you assignments over and over.