I am not sure there is a simple answer. It may require some extensive work on someone's part, but to get things started with some very limited research on my part, I did find out some interesting facts. I took two of the Power 5 Conferences, the Big 10 and Pac-12, and checked out each schools coaching staff, and was a bit surprised on some of the things I found out. We tend to look only at the number of Head Coaching Jobs being held by women, without digging further into seeing the make up of each schools coaching staff. While a majority of the Head Coaching positions were filled by men, 9 to 5 ratio in the Big 10 and 9 to 3 in the Pac-12, what I discovered was that at the other end was a different picture. When you look at the Volunteer and 2nd Assistant positions, I found that 61% of those positions were women. As I have said, I have only done limited research, so it is hard to tell whether this holds true in the last 5 to 10 years. But assuming it does, there should be a pool of potential candidates for future head coaching positions. But is there really any kind of pool building up? If the pool drops off, this may be a difference in a career choice for women, then it is for men, because of the huge commitments it will require being away from home with all the travelling required on their part , especially if there are children involved or even plans to have children. I guess the only way to really know as to why women leave coaching would be to do a survey on their reason they are leaving. Some other interesting things I did discover as well, were the ratio of men to women on each staff. It varied in different ways. For example, in the big 10 there are 5 women coaches. The Nebraska staff is composed of all men while the staffs of Minnesota and Michigan are all women. Ohio State and Illinois has a women's head coach with the rest of the their staff being men. With regards to the Pac 12, I was very surprised to find there were more men in their coaching ranks, 26 men and 19 women, while the Big 10 has a ratio of 27 women to 25 men. As progressive as the West Coast is, I would have had it the other way around. Washington State has and all men's staff right now, but does have a spot for a volunteer assistant. On the other hand the Washington team has a all female staff. It looks like getting more women involved in coaching, at least for these two conferences is being attempted, but for some reason it is not showing up on a bigger number staying the course.