I know a little bit as I worked for Birthright this past year. Birthright is an umbrella organization and then there are several organizations underneath them that actually run the trips. There are at least 13 different trip organizers. One of the trip organizers that I worked for, called Sachlav- Israel on the House definitely has, but as far as I know their all-girls trip only run in the summer and may only be 1 or 2 trips and they fill up very fast. Another organization called Ezra World which is religious run as far as I know I think run all-girls/all-guys trips. I think the Orthodox Union also runs separate trips as well.