Looking for Sibling born in MS

My siblings and I are looking for a sister that was born at Singing River Hospital in Pascagoula MS we believe in the summer of 1977 and was given up for adoption. We have very strong genes and look alike.. she would most likely have hazel to Green Eyes, light brown to dark brunette hair, small in stature and bone structure. We are thinking that it would be in June and/or July that the birth took place. Thank you!