diff --git a/backend/Dockerfile b/backend/Dockerfile
index c41f409..b1d64fd 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -32,6 +32,9 @@ COPY --from=builder /app/dist ./dist
 RUN addgroup -g 1001 -S nodejs
 RUN adduser -S nestjs -u 1001
 
+# Créer le dossier uploads et donner les permissions
+RUN mkdir -p /app/uploads/photos && chown -R nestjs:nodejs /app/uploads
+
 USER nestjs
 
 EXPOSE 3000
diff --git a/backend/src/routes/enfants/dto/create_enfants.dto.ts b/backend/src/routes/enfants/dto/create_enfants.dto.ts
index 7b55282..3ede09d 100644
--- a/backend/src/routes/enfants/dto/create_enfants.dto.ts
+++ b/backend/src/routes/enfants/dto/create_enfants.dto.ts
@@ -29,10 +29,10 @@ export class CreateEnfantsDto {
     @MaxLength(100)
     last_name?: string;
 
-    @ApiProperty({ enum: GenreType, required: false })
-    @IsOptional()
+    @ApiProperty({ enum: GenreType })
     @IsEnum(GenreType)
-    gender?: GenreType;
+    @IsNotEmpty()
+    gender: GenreType;
 
     @ApiProperty({ example: '2018-06-24', required: false })
     @ValidateIf(o => o.status !== StatutEnfantType.A_NAITRE)
diff --git a/backend/src/routes/enfants/enfants.controller.ts b/backend/src/routes/enfants/enfants.controller.ts
index c76dcd5..e112972 100644
--- a/backend/src/routes/enfants/enfants.controller.ts
+++ b/backend/src/routes/enfants/enfants.controller.ts
@@ -8,8 +8,13 @@ import {
   Patch,
   Post,
   UseGuards,
+  UseInterceptors,
+  UploadedFile,
 } from '@nestjs/common';
-import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
+import { FileInterceptor } from '@nestjs/platform-express';
+import { ApiBearerAuth, ApiTags, ApiConsumes } from '@nestjs/swagger';
+import { diskStorage } from 'multer';
+import { extname } from 'path';
 import { EnfantsService } from './enfants.service';
 import { CreateEnfantsDto } from './dto/create_enfants.dto';
 import { UpdateEnfantsDto } from './dto/update_enfants.dto';
@@ -28,8 +33,34 @@ export class EnfantsController {
 
   @Roles(RoleType.PARENT)
   @Post()
-  create(@Body() dto: CreateEnfantsDto, @User() currentUser: Users) {
-    return this.enfantsService.create(dto, currentUser);
+  @ApiConsumes('multipart/form-data')
+  @UseInterceptors(
+    FileInterceptor('photo', {
+      storage: diskStorage({
+        destination: './uploads/photos',
+        filename: (req, file, cb) => {
+          const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9);
+          const ext = extname(file.originalname);
+          cb(null, `enfant-${uniqueSuffix}${ext}`);
+        },
+      }),
+      fileFilter: (req, file, cb) => {
+        if (!file.mimetype.match(/\/(jpg|jpeg|png|gif)$/)) {
+          return cb(new Error('Seules les images sont autorisées'), false);
+        }
+        cb(null, true);
+      },
+      limits: {
+        fileSize: 5 * 1024 * 1024,
+      },
+    }),
+  )
+  create(
+    @Body() dto: CreateEnfantsDto,
+    @UploadedFile() photo: Express.Multer.File,
+    @User() currentUser: Users,
+  ) {
+    return this.enfantsService.create(dto, currentUser, photo);
   }
 
   @Roles(RoleType.ADMINISTRATEUR, RoleType.GESTIONNAIRE, RoleType.SUPER_ADMIN)
diff --git a/backend/src/routes/enfants/enfants.service.ts b/backend/src/routes/enfants/enfants.service.ts
index 952f2b1..bfefedb 100644
--- a/backend/src/routes/enfants/enfants.service.ts
+++ b/backend/src/routes/enfants/enfants.service.ts
@@ -24,10 +24,11 @@ export class EnfantsService {
     private readonly parentsChildrenRepository: Repository<ParentsChildren>,
   ) { }
 
-  // Création d’un enfant
-  async create(dto: CreateEnfantsDto, currentUser: Users): Promise<Children> {
+  // Création d'un enfant
+  async create(dto: CreateEnfantsDto, currentUser: Users, photoFile?: Express.Multer.File): Promise<Children> {
     const parent = await this.parentsRepository.findOne({
       where: { user_id: currentUser.id },
+      relations: ['co_parent'],
     });
     if (!parent) throw new NotFoundException('Parent introuvable');
 
@@ -46,17 +47,34 @@ export class EnfantsService {
     });
     if (exist) throw new ConflictException('Cet enfant existe déjà');
 
+    // Gestion de la photo uploadée
+    if (photoFile) {
+      dto.photo_url = `/uploads/photos/${photoFile.filename}`;
+      if (dto.consent_photo) {
+        dto.consent_photo_at = new Date().toISOString();
+      }
+    }
+
     // Création
     const child = this.childrenRepository.create(dto);
     await this.childrenRepository.save(child);
 
-    // Lien parent-enfant
+    // Lien parent-enfant (Parent 1)
     const parentLink = this.parentsChildrenRepository.create({
       parentId: parent.user_id,
       enfantId: child.id,
     });
     await this.parentsChildrenRepository.save(parentLink);
 
+    // Rattachement automatique au co-parent s'il existe
+    if (parent.co_parent) {
+      const coParentLink = this.parentsChildrenRepository.create({
+        parentId: parent.co_parent.id,
+        enfantId: child.id,
+      });
+      await this.parentsChildrenRepository.save(coParentLink);
+    }
+
     return this.findOne(child.id, currentUser);
   }