Shaykh Fawzaan mentions that never do the women mix with the men in Islaam, not even in the salah. Islaam has legislated that the women are behind the men.
So for this reason the worst row of the women is the front row because of being close to the men. And the best row of the women is the last row because it is the furthest from the men.
The evidence for this is in Sahih Muslim:
Abu Hurayrah said that the Prophet (May peace and blessings be upon him) said: “The best of the men’s rows is the first and the worst is the last, and the best of the women’s rows is the last and the worst in the first.”