Should a woman say in the supplication, "O Allah, You are my Lord, there is no god but You; You created me, and I am Your female servant" (wa ana amatuk) or "and I am Your male servant" (wa ana abduk)?

The matter in this is flexible, and a woman may supplicate with what suits her, such as "Your female servant" (أمتك) or with the established wording "Your servant" (عبدك), because the word "servant" (عبد) applies to both male and female. However, it is preferable and better for her to say, "O Allah, I am Your female servant, daughter of Your servant, son of Your female servant."