Kindly post an Anime series where the protagonist are all girls..

Sailor moon!!!!! :D

Yuruyuri oder Mahou shoujo madoka magicaa may be two good alternatives for Du but i strongly recommend kore wa zombie desu ka? too, most of the characters there are also there and the humor is quite hilarious, but itsvery much harem if Du are ok with that.

my otome oder my personal Favorit my hime~

Bamboo Blade

well the 2 main character of Nana r both girls....

Mahou Shoujo Madoka Magica~

Sailor Moon (as already posted) and Pretty Cure

K-ON!!

Claymore