(This is not for my wednesday vort).
The ratzon of HaShem in the creation was the creation of man. The pasuk says Elokim said to make man in his image of Elokim. In Kabbalah, Elokim is in the gevurah realm, which is female.
The other ratzon of HaShem was His resting on Shabbos on the seventh day. The seventh day in kabbalah is malchus, which is female. Shabbos is therefore a queen, and it contains the word bas (daughter). Moreover, in the beracha for Naftali (in Devarim) it states Naftali ??? ????. This is a remez for the connection between ???, the seventh day, and ratzon.
To make a long story short, the ratzon of HaShem is female. This is why females say sheasani keritzono, that they were made like his ratzon.