diff --git a/news/97.bugfix b/news/97.bugfix
new file mode 100644
index 0000000..dd16af8
--- /dev/null
+++ b/news/97.bugfix
@@ -0,0 +1 @@
+Fixed issue with Publication behavior fields having different values in the baseline and working copy [ericof]
\ No newline at end of file
diff --git a/plone/app/iterate/dexterity/copier.py b/plone/app/iterate/dexterity/copier.py
index d89a47f..2bc6995 100644
--- a/plone/app/iterate/dexterity/copier.py
+++ b/plone/app/iterate/dexterity/copier.py
@@ -64,12 +64,10 @@ def _replaceBaseline(self, baseline):
                 except Exception:
                     value = None
 
-                # TODO: We need a way to identify the DCFieldProperty
-                # fields and use the appropriate set_name/get_name
                 if name == "effective":
-                    baseline.effective_date = self.context.effective()
+                    baseline.effective_date = self.context.effective_date
                 elif name == "expires":
-                    baseline.expiration_date = self.context.expires()
+                    baseline.expiration_date = self.context.expiration_date
                 elif name == "subjects":
                     baseline.setSubject(self.context.Subject())
                 else:
@@ -188,12 +186,10 @@ def _copyBaseline(self, container):
                 except Exception:
                     value = None
 
-                # TODO: We need a way to identify the DCFieldProperty
-                # fields and use the appropriate set_name/get_name
                 if name == "effective":
-                    obj.effective_date = self.context.effective()
+                    obj.effective_date = self.context.effective_date
                 elif name == "expires":
-                    obj.expiration_date = self.context.expires()
+                    obj.expiration_date = self.context.expiration_date
                 elif name == "subjects":
                     obj.setSubject(self.context.Subject())
                 else:
@@ -231,12 +227,10 @@ def _replaceBaseline(self, baseline):
                 except Exception:
                     value = None
 
-                # TODO: We need a way to identify the DCFieldProperty
-                # fields and use the appropriate set_name/get_name
                 if name == "effective":
-                    baseline.effective_date = self.context.effective()
+                    baseline.effective_date = self.context.effective_date
                 elif name == "expires":
-                    baseline.expiration_date = self.context.expires()
+                    baseline.expiration_date = self.context.expiration_date
                 elif name == "subjects":
                     baseline.setSubject(self.context.Subject())
                 else:
diff --git a/plone/app/iterate/tests/test_iterate.py b/plone/app/iterate/tests/test_iterate.py
index f838f13..ecb4125 100644
--- a/plone/app/iterate/tests/test_iterate.py
+++ b/plone/app/iterate/tests/test_iterate.py
@@ -21,6 +21,7 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 ##################################################################
 
+from DateTime import DateTime
 from plone.app.iterate.browser.control import Control
 from plone.app.iterate.interfaces import ICheckinCheckoutPolicy
 from plone.app.iterate.testing import PLONEAPPITERATEDEX_INTEGRATION_TESTING
@@ -51,6 +52,7 @@ def setUp(self):
         self.portal.invokeFactory("Folder", "docs")
         self.portal.docs.invokeFactory("Document", "doc1")
         self.portal.docs.invokeFactory("Document", "doc2")
+        self.portal.docs.invokeFactory("FolderishDocument", "doc3")
 
         # add a working copy folder
         self.portal.invokeFactory("Folder", "workarea")
@@ -262,3 +264,40 @@ def test_baseline_relations_updated_on_checkin(self):
 
         # new baseline's relatedItems should be empty
         self.assertEqual(len(rels), 0)
+
+    def test_publication_behavior_values_not_changed(self):
+        doc = self.portal.docs.doc1
+        original_effective_date = doc.effective_date
+        original_expiration_date = doc.expiration_date
+        # Create a working copy
+        wc = ICheckinCheckoutPolicy(doc).checkout(self.portal.workarea)
+        # Check in without modifying the existing values
+        baseline = ICheckinCheckoutPolicy(wc).checkin("updated")
+        # Values should be the same of the original document
+        self.assertEqual(original_effective_date, baseline.effective_date)
+        self.assertEqual(original_expiration_date, baseline.expiration_date)
+
+    def test_publication_behavior_values_not_changed_value_is_already_set(self):
+        doc = self.portal.docs.doc2
+        effective_date = DateTime("2021/09/08 10:06:00 UTC")
+        doc.effective_date = effective_date
+        original_expiration_date = doc.expiration_date
+        # Create a working copy
+        wc = ICheckinCheckoutPolicy(doc).checkout(self.portal.workarea)
+        # Check in without modifying the existing values
+        baseline = ICheckinCheckoutPolicy(wc).checkin("updated")
+        # Values should be the same of the original document
+        self.assertEqual(effective_date, baseline.effective_date)
+        self.assertEqual(original_expiration_date, baseline.expiration_date)
+
+    def test_publication_behavior_values_not_changed_folderish(self):
+        doc = self.portal.docs.doc3
+        original_effective_date = doc.effective_date
+        original_expiration_date = doc.expiration_date
+        # Create a working copy
+        wc = ICheckinCheckoutPolicy(doc).checkout(self.portal.workarea)
+        # Check in without modifying the existing values
+        baseline = ICheckinCheckoutPolicy(wc).checkin("updated")
+        # Values should be the same of the original document
+        self.assertEqual(original_effective_date, baseline.effective_date)
+        self.assertEqual(original_expiration_date, baseline.expiration_date)