Boyd Clinic in Cedar Grove near Shreveport 1959-1960

We are searching for a birth sibling born at the Boyd Clinic in Cedar Grove near Shreveport, Louisiana between the dates of Mar 1959 and Jan 1960, plus or minus a month or two either way. We do not know if this sibling was a boy or girl. The birth mother was Bettye Knight or Frances Elizabeth Knight, she might have used the surname of Walker. She was 23-24 years old at the time of this birth.