Houchin Community Blood Bank is calling on everyone to donate blood in order to help a set of premature born twin baby girls.

The blood bank tweeted on Thursday that Gloria and Maya were born at 24 weeks and are in need of O-negative blood. People are encouraged to come donate at either of Houchin’s locations, 11515 Bolthouse Dr. and 5901 Truxtun Ave.

Donors can give blood between 9 a.m. and 6 p.m. on Mondays, Tuesdays, Wednesdays, and Fridays; Thursdays between 11 a.m. and 7 p.m.; and Saturdays between 8 a.m. and 4 p.m.

Donors must be in good health, weigh at least 110 pounds and be 17 years of age or older. Appointments can be scheduled at HCBB.com.