@@ -399,7 +399,7 @@ class MaternalHealthFormValue extends BaseFormValueChange {
DateTime dueDate = DateTime(
lastMenstrualPeriod.year,
lastMenstrualPeriod.month + 9,
- lastMenstrualPeriod.day + 7,
+ lastMenstrualPeriod.day + 6,
);
dueDate = DateTime(
dueDate.year + (dueDate.month > 12 ? 1 : 0), // 如果月份大于12，年份加一
