diff --git a/frontend/lib/models/user_registration_data.dart b/frontend/lib/models/user_registration_data.dart
index 9687898..6675566 100644
--- a/frontend/lib/models/user_registration_data.dart
+++ b/frontend/lib/models/user_registration_data.dart
@@ -1,7 +1,6 @@
 import 'dart:io'; // Pour File
 import '../models/card_assets.dart'; // Import de l'enum CardColorVertical
 import 'package:flutter/foundation.dart';
-import 'package:intl/intl.dart';
 // import 'package:p_tits_pas/models/child.dart'; // Commenté car fichier non trouvé
 
 class ParentData {
@@ -32,6 +31,8 @@ class ChildData {
   String firstName;
   String lastName;
   String dob; // Date de naissance ou prévisionnelle
+  /// Valeurs API : `H`, `F`, `Autre` (GenreType backend). Vide tant que non choisi.
+  String genre;
   bool photoConsent;
   bool multipleBirth;
   bool isUnbornChild;
@@ -42,12 +43,37 @@ class ChildData {
     this.firstName = '',
     this.lastName = '',
     this.dob = '',
+    this.genre = '',
     this.photoConsent = false,
     this.multipleBirth = false,
     this.isUnbornChild = false,
     this.imageFile,
     required this.cardColor, // Rendre requis dans le constructeur
   });
+
+  ChildData copyWith({
+    String? firstName,
+    String? lastName,
+    String? dob,
+    String? genre,
+    bool? photoConsent,
+    bool? multipleBirth,
+    bool? isUnbornChild,
+    File? imageFile,
+    CardColorVertical? cardColor,
+  }) {
+    return ChildData(
+      firstName: firstName ?? this.firstName,
+      lastName: lastName ?? this.lastName,
+      dob: dob ?? this.dob,
+      genre: genre ?? this.genre,
+      photoConsent: photoConsent ?? this.photoConsent,
+      multipleBirth: multipleBirth ?? this.multipleBirth,
+      isUnbornChild: isUnbornChild ?? this.isUnbornChild,
+      imageFile: imageFile ?? this.imageFile,
+      cardColor: cardColor ?? this.cardColor,
+    );
+  }
 }
 
 // Nouvelle classe pour les détails bancaires
diff --git a/frontend/lib/screens/auth/parent_register_step3_screen.dart b/frontend/lib/screens/auth/parent_register_step3_screen.dart
index 029cf79..ec73328 100644
--- a/frontend/lib/screens/auth/parent_register_step3_screen.dart
+++ b/frontend/lib/screens/auth/parent_register_step3_screen.dart
@@ -135,16 +135,7 @@ class _ParentRegisterStep3ScreenState extends State<ParentRegisterStep3Screen> {
       if (pickedFile != null) {
         if (childIndex < registrationData.children.length) {
           final oldChild = registrationData.children[childIndex];
-          final updatedChild = ChildData(
-            firstName: oldChild.firstName,
-            lastName: oldChild.lastName,
-            dob: oldChild.dob,
-            photoConsent: oldChild.photoConsent,
-            multipleBirth: oldChild.multipleBirth,
-            isUnbornChild: oldChild.isUnbornChild,
-            imageFile: File(pickedFile.path),
-            cardColor: oldChild.cardColor,
-          );
+          final updatedChild = oldChild.copyWith(imageFile: File(pickedFile.path));
           registrationData.updateChild(childIndex, updatedChild);
         }
       } 
@@ -185,15 +176,8 @@ class _ParentRegisterStep3ScreenState extends State<ParentRegisterStep3Screen> {
     );
     if (picked != null) {
       final oldChild = registrationData.children[childIndex];
-      final updatedChild = ChildData(
-          firstName: oldChild.firstName,
-          lastName: oldChild.lastName,
-          dob: "${picked.day.toString().padLeft(2, '0')}/${picked.month.toString().padLeft(2, '0')}/${picked.year}",
-          photoConsent: oldChild.photoConsent,
-          multipleBirth: oldChild.multipleBirth,
-          isUnbornChild: oldChild.isUnbornChild,
-          imageFile: oldChild.imageFile,
-          cardColor: oldChild.cardColor,
+      final updatedChild = oldChild.copyWith(
+        dob: "${picked.day.toString().padLeft(2, '0')}/${picked.month.toString().padLeft(2, '0')}/${picked.year}",
       );
       registrationData.updateChild(childIndex, updatedChild);
     }
@@ -289,35 +273,29 @@ class _ParentRegisterStep3ScreenState extends State<ParentRegisterStep3Screen> {
                     childIndex: index,
                     onPickImage: () => _pickImage(index, registrationData),
                     onDateSelect: () => _selectDate(context, index, registrationData),
-                    onFirstNameChanged: (value) => setState(() => registrationData.updateChild(index, ChildData(
-                      firstName: value, lastName: registrationData.children[index].lastName, dob: registrationData.children[index].dob, photoConsent: registrationData.children[index].photoConsent,
-                      multipleBirth: registrationData.children[index].multipleBirth, isUnbornChild: registrationData.children[index].isUnbornChild, imageFile: registrationData.children[index].imageFile, cardColor: registrationData.children[index].cardColor
-                    ))),
-                    onLastNameChanged: (value) => setState(() => registrationData.updateChild(index, ChildData(
-                      firstName: registrationData.children[index].firstName, lastName: value, dob: registrationData.children[index].dob, photoConsent: registrationData.children[index].photoConsent,
-                      multipleBirth: registrationData.children[index].multipleBirth, isUnbornChild: registrationData.children[index].isUnbornChild, imageFile: registrationData.children[index].imageFile, cardColor: registrationData.children[index].cardColor
-                    ))),
+                    onFirstNameChanged: (value) => setState(() {
+                      final c = registrationData.children[index];
+                      registrationData.updateChild(index, c.copyWith(firstName: value));
+                    }),
+                    onLastNameChanged: (value) => setState(() {
+                      final c = registrationData.children[index];
+                      registrationData.updateChild(index, c.copyWith(lastName: value));
+                    }),
+                    onGenreChanged: (value) {
+                      final oldChild = registrationData.children[index];
+                      registrationData.updateChild(index, oldChild.copyWith(genre: value));
+                    },
                     onTogglePhotoConsent: (newValue) {
                       final oldChild = registrationData.children[index];
-                      registrationData.updateChild(index, ChildData(
-                        firstName: oldChild.firstName, lastName: oldChild.lastName, dob: oldChild.dob, photoConsent: newValue,
-                        multipleBirth: oldChild.multipleBirth, isUnbornChild: oldChild.isUnbornChild, imageFile: oldChild.imageFile, cardColor: oldChild.cardColor
-                      ));
+                      registrationData.updateChild(index, oldChild.copyWith(photoConsent: newValue));
                     },
                     onToggleMultipleBirth: (newValue) {
                       final oldChild = registrationData.children[index];
-                      registrationData.updateChild(index, ChildData(
-                        firstName: oldChild.firstName, lastName: oldChild.lastName, dob: oldChild.dob, photoConsent: oldChild.photoConsent,
-                        multipleBirth: newValue, isUnbornChild: oldChild.isUnbornChild, imageFile: oldChild.imageFile, cardColor: oldChild.cardColor
-                      ));
+                      registrationData.updateChild(index, oldChild.copyWith(multipleBirth: newValue));
                     },
                     onToggleIsUnborn: (newValue) {
                       final oldChild = registrationData.children[index];
-                      registrationData.updateChild(index, ChildData(
-                        firstName: oldChild.firstName, lastName: oldChild.lastName, dob: oldChild.dob,
-                        photoConsent: oldChild.photoConsent, multipleBirth: oldChild.multipleBirth, isUnbornChild: newValue,
-                        imageFile: oldChild.imageFile, cardColor: oldChild.cardColor
-                      ));
+                      registrationData.updateChild(index, oldChild.copyWith(isUnbornChild: newValue));
                     },
                     onRemove: () => _removeChild(index, registrationData),
                     canBeRemoved: registrationData.children.length > 1,
@@ -395,36 +373,30 @@ class _ParentRegisterStep3ScreenState extends State<ParentRegisterStep3Screen> {
                                   childIndex: index,
                                   onPickImage: () => _pickImage(index, registrationData),
                                   onDateSelect: () => _selectDate(context, index, registrationData),
-                                  onFirstNameChanged: (value) => setState(() => registrationData.updateChild(index, ChildData(
-                                    firstName: value, lastName: registrationData.children[index].lastName, dob: registrationData.children[index].dob, photoConsent: registrationData.children[index].photoConsent,
-                                    multipleBirth: registrationData.children[index].multipleBirth, isUnbornChild: registrationData.children[index].isUnbornChild, imageFile: registrationData.children[index].imageFile, cardColor: registrationData.children[index].cardColor
-                                  ))),
-                                  onLastNameChanged: (value) => setState(() => registrationData.updateChild(index, ChildData(
-                                    firstName: registrationData.children[index].firstName, lastName: value, dob: registrationData.children[index].dob, photoConsent: registrationData.children[index].photoConsent,
-                                    multipleBirth: registrationData.children[index].multipleBirth, isUnbornChild: registrationData.children[index].isUnbornChild, imageFile: registrationData.children[index].imageFile, cardColor: registrationData.children[index].cardColor
-                                  ))),
+                                  onFirstNameChanged: (value) => setState(() {
+                                    final c = registrationData.children[index];
+                                    registrationData.updateChild(index, c.copyWith(firstName: value));
+                                  }),
+                                  onLastNameChanged: (value) => setState(() {
+                                    final c = registrationData.children[index];
+                                    registrationData.updateChild(index, c.copyWith(lastName: value));
+                                  }),
+                                  onGenreChanged: (value) {
+                                    final oldChild = registrationData.children[index];
+                                    registrationData.updateChild(index, oldChild.copyWith(genre: value));
+                                  },
                                   onTogglePhotoConsent: (newValue) {
                                     final oldChild = registrationData.children[index];
-                                    registrationData.updateChild(index, ChildData(
-                                      firstName: oldChild.firstName, lastName: oldChild.lastName, dob: oldChild.dob, photoConsent: newValue,
-                                      multipleBirth: oldChild.multipleBirth, isUnbornChild: oldChild.isUnbornChild, imageFile: oldChild.imageFile, cardColor: oldChild.cardColor
-                                    ));
+                                    registrationData.updateChild(index, oldChild.copyWith(photoConsent: newValue));
                                   },
                                   onToggleMultipleBirth: (newValue) {
-                                     final oldChild = registrationData.children[index];
-                                    registrationData.updateChild(index, ChildData(
-                                      firstName: oldChild.firstName, lastName: oldChild.lastName, dob: oldChild.dob, photoConsent: oldChild.photoConsent,
-                                      multipleBirth: newValue, isUnbornChild: oldChild.isUnbornChild, imageFile: oldChild.imageFile, cardColor: oldChild.cardColor
-                                    ));
+                                    final oldChild = registrationData.children[index];
+                                    registrationData.updateChild(index, oldChild.copyWith(multipleBirth: newValue));
                                   },
                                   onToggleIsUnborn: (newValue) {
-                                     final oldChild = registrationData.children[index];
-                                     registrationData.updateChild(index, ChildData(
-                                        firstName: oldChild.firstName, lastName: oldChild.lastName, dob: oldChild.dob,
-                                        photoConsent: oldChild.photoConsent, multipleBirth: oldChild.multipleBirth, isUnbornChild: newValue, 
-                                        imageFile: oldChild.imageFile, cardColor: oldChild.cardColor
-                                     ));
-                                   },
+                                    final oldChild = registrationData.children[index];
+                                    registrationData.updateChild(index, oldChild.copyWith(isUnbornChild: newValue));
+                                  },
                                   onRemove: () => _removeChild(index, registrationData),
                                   canBeRemoved: registrationData.children.length > 1,
                                 ),
diff --git a/frontend/lib/screens/auth/parent_register_step5_screen.dart b/frontend/lib/screens/auth/parent_register_step5_screen.dart
index 62dc5d3..c3d859a 100644
--- a/frontend/lib/screens/auth/parent_register_step5_screen.dart
+++ b/frontend/lib/screens/auth/parent_register_step5_screen.dart
@@ -251,6 +251,7 @@ class _ParentRegisterStep5ScreenState extends State<ParentRegisterStep5Screen> {
           onDateSelect: () {},
           onFirstNameChanged: (v) {},
           onLastNameChanged: (v) {},
+          onGenreChanged: (_) {},
           onTogglePhotoConsent: (v) {},
           onToggleMultipleBirth: (v) {},
           onToggleIsUnborn: (v) {},
diff --git a/frontend/lib/utils/parent_registration_payload.dart b/frontend/lib/utils/parent_registration_payload.dart
index 7651e09..3035efb 100644
--- a/frontend/lib/utils/parent_registration_payload.dart
+++ b/frontend/lib/utils/parent_registration_payload.dart
@@ -8,6 +8,8 @@ class ParentRegistrationPayload {
   ParentRegistrationPayload._();
 
   static final RegExp _phoneFr = RegExp(r'^(\+33|0)[1-9](\d{2}){4}$');
+  /// Aligné sur `GenreType` (backend) : JSON exact `H`, `F`, `Autre`.
+  static const Set<String> apiGenres = {'H', 'F', 'Autre'};
 
   /// Retourne un message d'erreur utilisateur, ou `null` si le formulaire est cohérent.
   static String? validateForApi(UserRegistrationData d) {
@@ -57,6 +59,9 @@ class ParentRegistrationPayload {
     for (var i = 0; i < d.children.length; i++) {
       final c = d.children[i];
       final label = 'Enfant ${i + 1}';
+      if (!apiGenres.contains(c.genre)) {
+        return '$label : sélectionnez le genre (garçon, fille ou autre).';
+      }
       if (c.isUnbornChild) {
         final due = _ddMmYyyyToIso(c.dob);
         if (due == null) {
@@ -130,7 +135,7 @@ class ParentRegistrationPayload {
 
   static Map<String, dynamic> _childToJson(ChildData c, int index, String parentNom) {
     final map = <String, dynamic>{
-      'genre': 'F',
+      'genre': c.genre,
       'grossesse_multiple': c.multipleBirth,
     };
 
diff --git a/frontend/lib/widgets/child_card_widget.dart b/frontend/lib/widgets/child_card_widget.dart
index 18bdf72..2966665 100644
--- a/frontend/lib/widgets/child_card_widget.dart
+++ b/frontend/lib/widgets/child_card_widget.dart
@@ -19,6 +19,8 @@ class ChildCardWidget extends StatefulWidget {
   final VoidCallback onDateSelect;
   final ValueChanged<String> onFirstNameChanged;
   final ValueChanged<String> onLastNameChanged;
+  /// `H`, `F` ou `Autre` (GenreType API).
+  final ValueChanged<String> onGenreChanged;
   final ValueChanged<bool> onTogglePhotoConsent;
   final ValueChanged<bool> onToggleMultipleBirth;
   final ValueChanged<bool> onToggleIsUnborn;
@@ -35,6 +37,7 @@ class ChildCardWidget extends StatefulWidget {
     required this.onDateSelect,
     required this.onFirstNameChanged,
     required this.onLastNameChanged,
+    required this.onGenreChanged,
     required this.onTogglePhotoConsent,
     required this.onToggleMultipleBirth,
     required this.onToggleIsUnborn,
@@ -190,6 +193,8 @@ class _ChildCardWidgetState extends State<ChildCardWidget> {
                 hint: 'Nom de l\'enfant',
               ),
               SizedBox(height: 8.0 * scaleFactor),
+              _buildGenreField(context, config, scaleFactor),
+              SizedBox(height: 8.0 * scaleFactor),
               _buildField(
                 config: config,
                 scaleFactor: scaleFactor,
@@ -352,6 +357,8 @@ class _ChildCardWidgetState extends State<ChildCardWidget> {
                           const SizedBox(height: 12),
                           _buildReadonlyField('Nom :', _lastNameController.text),
                           const SizedBox(height: 12),
+                          _buildReadonlyField('Genre :', _genreDisplayLabel(widget.childData.genre)),
+                          const SizedBox(height: 12),
                           _buildReadonlyField(
                             widget.childData.isUnbornChild ? 'Date prévisionnelle :' : 'Date de naissance :',
                             _dobController.text
@@ -467,6 +474,8 @@ class _ChildCardWidgetState extends State<ChildCardWidget> {
                     const SizedBox(height: 8),
                     _buildReadonlyField('Nom :', _lastNameController.text),
                     const SizedBox(height: 8),
+                    _buildReadonlyField('Genre :', _genreDisplayLabel(widget.childData.genre)),
+                    const SizedBox(height: 8),
                     _buildReadonlyField(
                       widget.childData.isUnbornChild ? 'Date prévisionnelle :' : 'Date de naissance :',
                       _dobController.text
@@ -556,6 +565,72 @@ class _ChildCardWidgetState extends State<ChildCardWidget> {
     );
   }
 
+  static String _genreDisplayLabel(String g) {
+    switch (g) {
+      case 'H':
+        return 'Garçon';
+      case 'F':
+        return 'Fille';
+      case 'Autre':
+        return 'Autre / ne souhaite pas préciser';
+      default:
+        return '';
+    }
+  }
+
+  Widget _buildGenreField(BuildContext context, DisplayConfig config, double scaleFactor) {
+    if (config.isReadonly) {
+      return FormFieldWrapper(
+        config: config,
+        label: 'Genre',
+        value: _genreDisplayLabel(widget.childData.genre),
+      );
+    }
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Text(
+          'Genre *',
+          style: GoogleFonts.merienda(
+            fontSize: config.isMobile ? 12.0 : 18.0 * scaleFactor,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+        SizedBox(height: 4.0 * scaleFactor),
+        Container(
+          width: double.infinity,
+          padding: EdgeInsets.symmetric(horizontal: 14.0 * scaleFactor, vertical: 4.0),
+          decoration: BoxDecoration(
+            image: const DecorationImage(
+              image: AssetImage('assets/images/bg_beige.png'),
+              fit: BoxFit.fill,
+            ),
+            borderRadius: BorderRadius.circular(8 * scaleFactor),
+          ),
+          child: DropdownButtonHideUnderline(
+            child: DropdownButton<String>(
+              isExpanded: true,
+              value: widget.childData.genre.isEmpty ? null : widget.childData.genre,
+              hint: Text('Choisir', style: GoogleFonts.merienda(fontSize: config.isMobile ? 13.0 : 16.0)),
+              style: GoogleFonts.merienda(fontSize: config.isMobile ? 13.0 : 16.0, color: Colors.black87),
+              items: [
+                DropdownMenuItem(value: 'H', child: Text('Garçon', style: GoogleFonts.merienda())),
+                DropdownMenuItem(value: 'F', child: Text('Fille', style: GoogleFonts.merienda())),
+                DropdownMenuItem(
+                  value: 'Autre',
+                  child: Text('Autre / ne souhaite pas préciser', style: GoogleFonts.merienda()),
+                ),
+              ],
+              onChanged: (v) {
+                if (v != null) widget.onGenreChanged(v);
+              },
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+
   Widget _buildField({
     required DisplayConfig config,
     required double scaleFactor,