Trinity Hospital will offer prepared childbirth classes on Tuesdays from May 13-June 3 from 7 to 9 p.m. in Health Center-Third Street, Minot. Similar information will be offered May 16 from 6 to 9 p.m. and May 17 from 9 a.m. to 4 p.m. To register for either class or for more information, call 857-2310 or 1-800-862-0005.