The pair, who made the transition from the Ladies' Centre of Excellence to the first team in 2013, are both England youth internationals.
Midfielder Bailey helped England's Under-19s to the final of the UEFA European Women’s U19 Championship in France, in August. The 18-year-old has also represented her country at Under-17 level.
Ayisi,17, impressed for the Three Lions' Under-17s recently earned here a call up to the Under-20s squad.
General Manager Vic Akers said: "Both Jade and Freda are real talents and deserved their first senior contracts. Jade's been with us since she was a youngster, and come right through the Centre of Excellence system. Freda's been with the academy for a number of years too. They've both got bright futures ahead of them."Copyright 2014 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 23 Dec 2013