diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java
index 4ad8956..017bd0b 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/AntenatalExaminationFacade.java
@@ -1044,7 +1044,7 @@ public class AntenatalExaminationFacade {
                 if (o1.getDate() != null && o1.getDate().after(o2.getDate())) {
                     return -1;
                 }
-                if (o1.getDate().before(o2.getDate())) {
+                if (o1.getDate() != null &&  o1.getDate().before(o2.getDate())) {
                     return 1;
                 }
                 return 0;