Erin Caughey, Marie Hanrahan (both Malone RFC), Kathryn Dane (Enniskillen RFC) and Shannen Lane (Co Cavan RFC) have all been included.
The squad was selected following an extensive screening process involving 200 girls in all four provinces that also included an opportunity for the attendees to learn new skills.
Six of the current squad were in the side that finished fourth in the UK School Games last year - Caughey, Lane, Meabh Donohue, Irene Herlihy, Mairead Hopkins and Jayne Pennefeather.
Amee-Leigh Murphy Crowe, who was also part of that squad, was subsequently selected in the Ireland Women's Sevens squad for the IRB Women's Sevens World Series this season.
IRELAND UNDER-18 GIRLS SEVENS TRAINING SQUAD
Chloe Aherne (Munster)
Chloe Blackmore (Carrick on Suir/Munster)
Erin Caughey (Malone/Ulster)
Eimear Corri (Portlaoise/Leinster)
Kathryn Dane (Enniskillen/Ulster)
Meabh Donohue (Tullow/Leinster)
Kate English (Carrick-on-Suir/Munster)
Stacey Flood (Railway Union/Leinster)
Marie Hanrahan (Malone/Ulster)
Irene Herlihy (Mallow/Munster)
Kayleigh Hopkins (Ballina/Connacht)
Mairead Hopkins (Ballina/Connacht)
Jessica Hunt (Wicklow/Leinster)
Meaghan Kenny (Navan/Leinster)
Shannen Lane (Cavan/Ulster)
Zoe Lynch (Carrick-on-Suir/Munster)
Molly McCabe (Westmanstown/Leinster)
Hannagh McKay (Railway Union/Leinster)
Meabh O'Brien (Naas/Leinster)
Elsie O'Connor (Rockwell College/Munster)
Aisling O'Hagan (Thurles/Munster)
Yvonne O'Shead (Bantry Bay/Munster)
Jayne Pennefeather (Carrigaline/Munster)
Louise Scally (Cill Dara/Leinster)
ULSTER PLAYER PROFILES
Kathryn Dane
Age: 17
Club: Enniskillen RFC
Position: Scrumhalf
Shannen Lane
Age: 17
Club: Co Cavan RFC
Position: Scrumhalf / winger
Erin Caughey
Age: 17
Club: Malone RFC
Position: Outhalf
Máire Hanrahan
Age: 16
Club: Malone RFC
Position: Wing
Neal Johnston (Greater Belfast), Neal.Johnston@ulsterrugby.com
Zoe Templeton (South Ulster), Zoe.Templeton@ulsterrugby.com
Glenda Mellon (North Ulster), Glenda.Mellon@ulsterrugby.com