PERTH AMBOY — Raritan Bay Medical Center is sponsoring a one day Childbirth Education class Saturday, April 13, 8 a.m. to 4 p.m. The class is designed to help expectant parents better understand the childbearing process. A registered nurse with special training in labor, delivery and childcare techniques will facilitate the class. It will be held at Raritan Bay Area YMCA, 357 New Brunswick Ave., Lower Level, Perth Amboy. The fee for the course is $125 per couple. Registration required, call 1-800-DOCTORS (1-800-362-8677).