Z3A - Weeks of gestation
Z3A.0 - Weeks of gestation of pregnancy, unspecified or less than 10 weeks
Z3A.00 - Weeks of gestation of pregnancy not specified
Z3A.01 - Less than 8 weeks gestation of pregnancy
Z3A.08 - 8 weeks gestation of pregnancy
Z3A.09 - 9 weeks gestation of pregnancy