diff --git a/client/src/app/shared/models/users/user.ts b/client/src/app/shared/models/users/user.ts
index aa2e17d15..75add5053 100644
--- a/client/src/app/shared/models/users/user.ts
+++ b/client/src/app/shared/models/users/user.ts
@@ -2,6 +2,11 @@ import { Searchable } from '../base/searchable';
 import { SearchRepresentation } from '../../../core/services/search.service';
 import { BaseModel } from '../base/base-model';
 
+/**
+ * Iterable pre selection of genders (sexes)
+ */
+export const genders = ['Female', 'Male', 'Diverse'];
+
 /**
  * Representation of a user in contrast to the operator.
  * @ignore
@@ -14,6 +19,7 @@ export class User extends BaseModel<User> implements Searchable {
     public title: string;
     public first_name: string;
     public last_name: string;
+    public gender: string;
     public structure_level: string;
     public number: string;
     public about_me: string;
diff --git a/client/src/app/site/agenda/components/speaker-list/speaker-list.component.html b/client/src/app/site/agenda/components/speaker-list/speaker-list.component.html
index 77fd9058c..f21bdc378 100644
--- a/client/src/app/site/agenda/components/speaker-list/speaker-list.component.html
+++ b/client/src/app/site/agenda/components/speaker-list/speaker-list.component.html
@@ -4,9 +4,7 @@
         <h2><span translate>List of speakers</span></h2>
     </div>
     <div class="menu-slot" *osPerms="'agenda.can_manage_list_of_speakers'">
-        <button type="button" mat-icon-button [matMenuTriggerFor]="speakerMenu">
-            <mat-icon>more_vert</mat-icon>
-        </button>
+        <button type="button" mat-icon-button [matMenuTriggerFor]="speakerMenu"><mat-icon>more_vert</mat-icon></button>
     </div>
 </os-head-bar>
 
@@ -68,6 +66,7 @@
                         <span *ngIf="hasSpokenCount(item)" class="red-warning-text speaker-warning">
                             {{ hasSpokenCount(item) + 1 }}. <span translate>contribution</span>
                         </span>
+                        <span *ngIf="item.gender">({{ item.gender | translate }})</span>
                     </span>
                     <mat-button-toggle-group *osPerms="'agenda.can_manage_list_of_speakers'">
                         <mat-button-toggle matTooltip="{{ 'Begin speech' | translate }}" (click)="onStartButton(item)">
@@ -117,7 +116,6 @@
 </mat-card>
 
 <mat-menu #speakerMenu="matMenu">
-
     <button mat-menu-item *ngIf="closedList" (click)="openSpeakerList()">
         <mat-icon>mic</mat-icon>
         <span translate>Open list of speakers</span>
diff --git a/client/src/app/site/agenda/models/view-speaker.ts b/client/src/app/site/agenda/models/view-speaker.ts
index 62b6a46ec..b5e354477 100644
--- a/client/src/app/site/agenda/models/view-speaker.ts
+++ b/client/src/app/site/agenda/models/view-speaker.ts
@@ -46,6 +46,10 @@ export class ViewSpeaker extends BaseViewModel implements Selectable {
         return this.user.full_name || this.user.username;
     }
 
+    public get gender(): string {
+        return this.user.gender || '';
+    }
+
     public constructor(speaker?: Speaker, user?: User) {
         super();
         this._speaker = speaker;
diff --git a/client/src/app/site/users/components/user-detail/user-detail.component.html b/client/src/app/site/users/components/user-detail/user-detail.component.html
index d069e770c..7fa20b161 100644
--- a/client/src/app/site/users/components/user-detail/user-detail.component.html
+++ b/client/src/app/site/users/components/user-detail/user-detail.component.html
@@ -9,8 +9,7 @@
     <!-- Title -->
     <div class="title-slot">
         <h2>
-            <span *ngIf="newUser" translate>New participant</span>
-            <span *ngIf="!newUser">{{ user.full_name }}</span>
+            <span *ngIf="newUser" translate>New participant</span> <span *ngIf="!newUser">{{ user.full_name }}</span>
         </h2>
     </div>
 
@@ -39,61 +38,74 @@
         [formGroup]="personalInfoForm"
         (ngSubmit)="saveUser()"
         *ngIf="user"
-        (keydown)="onKeyDown($event)">
+        (keydown)="onKeyDown($event)"
+    >
         <!-- <h3 translate>Personal Data</h3> -->
         <div *ngIf="isAllowed('seeName')">
             <!-- Title -->
             <mat-form-field
                 class="form16 distance force-min-with"
-                *ngIf="user.title || (editUser && isAllowed('manage'))">
+                *ngIf="user.title || (editUser && isAllowed('manage'))"
+            >
                 <input
                     type="text"
                     matInput
                     osAutofocus
                     placeholder="{{ 'Title' | translate }}"
                     formControlName="title"
-                    [value]="user.title"/>
+                    [value]="user.title"
+                />
             </mat-form-field>
 
             <!-- First name -->
             <mat-form-field
                 class="form37 distance force-min-with"
-                *ngIf="user.first_name || (editUser && isAllowed('manage'))">
+                *ngIf="user.first_name || (editUser && isAllowed('manage'))"
+            >
                 <input
                     type="text"
                     matInput
                     placeholder="{{ 'Given name' | translate }}"
                     formControlName="first_name"
-                    [value]="user.first_name"/>
+                    [value]="user.first_name"
+                />
             </mat-form-field>
 
             <!-- Last name -->
-            <mat-form-field
-                class="form37 force-min-with"
-                *ngIf="user.last_name || (editUser && isAllowed('manage'))">
+            <mat-form-field class="form37 force-min-with" *ngIf="user.last_name || (editUser && isAllowed('manage'))">
                 <input
                     type="text"
                     matInput
                     placeholder="{{ 'Surname' | translate }}"
                     formControlName="last_name"
-                    [value]="user.last_name"/>
+                    [value]="user.last_name"
+                />
             </mat-form-field>
         </div>
 
         <div *ngIf="isAllowed('seePersonal')">
             <!-- E-Mail -->
-            <mat-form-field *ngIf="user.email || editUser">
+            <mat-form-field class="form70 distance" *ngIf="user.email || editUser">
                 <input
                     type="email"
                     matInput
                     placeholder="{{ 'Email' | translate }}"
                     name="email"
                     formControlName="email"
-                    [value]="user.email"/>
+                    [value]="user.email"
+                />
                 <mat-error *ngIf="personalInfoForm.get('email').hasError('email')" translate>
                     Please enter a valid email address
                 </mat-error>
             </mat-form-field>
+
+            <!-- Gender -->
+            <mat-form-field class="form25 force-min-with" *ngIf="user.gender || editUser">
+                <mat-select placeholder="{{ 'Gender' | translate }}" formControlName="gender">
+                    <mat-option>-</mat-option>
+                    <mat-option *ngFor="let gender of genderList" [value]="gender">{{ gender | translate }}</mat-option>
+                </mat-select>
+            </mat-form-field>
         </div>
 
         <div>
@@ -104,19 +116,22 @@
                     matInput
                     placeholder="{{ 'Structure level' | translate }}"
                     formControlName="structure_level"
-                    [value]="user.structure_level"/>
+                    [value]="user.structure_level"
+                />
             </mat-form-field>
 
             <!-- Participant Number -->
             <mat-form-field
                 class="form25 force-min-with"
-                *ngIf="user.participant_number || (editUser && isAllowed('manage'))">
+                *ngIf="user.participant_number || (editUser && isAllowed('manage'))"
+            >
                 <input
                     type="text"
                     matInput
                     placeholder="{{ 'Participant number' | translate }}"
                     formControlName="number"
-                    [value]="user.participant_number"/>
+                    [value]="user.participant_number"
+                />
             </mat-form-field>
         </div>
 
@@ -136,7 +151,8 @@
                     matInput
                     placeholder="{{ 'Initial password' | translate }}"
                     formControlName="default_password"
-                    [value]="user.default_password"/>
+                    [value]="user.default_password"
+                />
                 <mat-hint align="end">Generate</mat-hint>
                 <button
                     type="button"
@@ -144,7 +160,8 @@
                     matSuffix
                     mat-icon-button
                     [disabled]="!newUser"
-                    (click)="generatePassword()">
+                    (click)="generatePassword()"
+                >
                     <mat-icon>sync_problem</mat-icon>
                 </button>
             </mat-form-field>
@@ -166,7 +183,8 @@
                     matInput
                     placeholder="{{ 'Username' | translate }}"
                     formControlName="username"
-                    [value]="user.username"/>
+                    [value]="user.username"
+                />
             </mat-form-field>
         </div>
 
@@ -177,7 +195,8 @@
                     matInput
                     placeholder="{{ 'Comment' | translate }}"
                     formControlName="comment"
-                    [value]="user.comment"/>
+                    [value]="user.comment"
+                />
                 <mat-hint translate>Only for internal notes.</mat-hint>
             </mat-form-field>
         </div>
@@ -187,7 +206,8 @@
             <mat-checkbox
                 formControlName="is_present"
                 matTooltip="{{ 'Designates whether this user is in the room.' | translate }}"
-                [value]="user.is_present">
+                [value]="user.is_present"
+            >
                 <span translate>Is present</span>
             </mat-checkbox>
 
@@ -199,7 +219,8 @@
                 matTooltip="{{
                     'Designates whether this user should be treated as active. Unselect this instead of deleting the account.'
                         | translate
-                }}">
+                }}"
+            >
                 <span translate>Is active</span>
             </mat-checkbox>
 
@@ -207,7 +228,8 @@
             <mat-checkbox
                 formControlName="is_committee"
                 [value]="user.is_committee"
-                matTooltip="{{ 'Designates whether this user should be treated as a committee.' | translate }}">
+                matTooltip="{{ 'Designates whether this user should be treated as a committee.' | translate }}"
+            >
                 <span translate>Is a committee</span>
             </mat-checkbox>
         </div>
diff --git a/client/src/app/site/users/components/user-detail/user-detail.component.ts b/client/src/app/site/users/components/user-detail/user-detail.component.ts
index fa3c3a7fe..23e0c4c1a 100644
--- a/client/src/app/site/users/components/user-detail/user-detail.component.ts
+++ b/client/src/app/site/users/components/user-detail/user-detail.component.ts
@@ -1,16 +1,18 @@
 import { Component, OnInit } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
 import { FormGroup, FormBuilder, Validators } from '@angular/forms';
+import { MatSnackBar } from '@angular/material';
+import { Title } from '@angular/platform-browser';
 
+import { TranslateService } from '@ngx-translate/core';
+
+import { genders } from 'app/shared/models/users/user';
 import { ViewUser } from '../../models/view-user';
 import { UserRepositoryService } from '../../services/user-repository.service';
 import { Group } from '../../../../shared/models/users/group';
 import { DataStoreService } from '../../../../core/services/data-store.service';
 import { OperatorService } from '../../../../core/services/operator.service';
 import { BaseViewComponent } from '../../../base/base-view';
-import { TranslateService } from '@ngx-translate/core';
-import { MatSnackBar } from '@angular/material';
-import { Title } from '@angular/platform-browser';
 import { PromptService } from '../../../../core/services/prompt.service';
 
 /**
@@ -62,6 +64,11 @@ export class UserDetailComponent extends BaseViewComponent implements OnInit {
      */
     public groups: Group[];
 
+    /**
+     * Hold the list of genders (sexes) publicly to dynamically iterate in the view
+     */
+    public genderList = genders;
+
     /**
      * Constructor for user
      *
@@ -114,6 +121,7 @@ export class UserDetailComponent extends BaseViewComponent implements OnInit {
 
     /**
      * Checks, if the given user id matches with the operator ones.
+     *
      * @param userId The id to check, if it's the operator
      * @returns If the user is the operator
      */
@@ -178,6 +186,7 @@ export class UserDetailComponent extends BaseViewComponent implements OnInit {
             title: [''],
             first_name: [''],
             last_name: [''],
+            gender: [''],
             structure_level: [''],
             number: [''],
             about_me: [''],
@@ -226,6 +235,7 @@ export class UserDetailComponent extends BaseViewComponent implements OnInit {
                     this.personalInfoForm.get('first_name'),
                     this.personalInfoForm.get('last_name'),
                     this.personalInfoForm.get('email'),
+                    this.personalInfoForm.get('gender'),
                     this.personalInfoForm.get('structure_level'),
                     this.personalInfoForm.get('number'),
                     this.personalInfoForm.get('groups_id'),
@@ -241,6 +251,7 @@ export class UserDetailComponent extends BaseViewComponent implements OnInit {
                 allowedFormFields.push(
                     this.personalInfoForm.get('username'),
                     this.personalInfoForm.get('email'),
+                    this.personalInfoForm.get('gender'),
                     this.personalInfoForm.get('about_me')
                 );
             }
diff --git a/client/src/app/site/users/models/view-user.ts b/client/src/app/site/users/models/view-user.ts
index 12529b263..17fe55363 100644
--- a/client/src/app/site/users/models/view-user.ts
+++ b/client/src/app/site/users/models/view-user.ts
@@ -47,6 +47,10 @@ export class ViewUser extends BaseProjectableModel {
         return this.user ? this.user.email : null;
     }
 
+    public get gender(): string {
+        return this.user ? this.user.gender : null;
+    }
+
     public get structure_level(): string {
         return this.user ? this.user.structure_level : null;
     }
diff --git a/client/src/app/site/users/services/user-repository.service.ts b/client/src/app/site/users/services/user-repository.service.ts
index b56925d2a..a19175259 100644
--- a/client/src/app/site/users/services/user-repository.service.ts
+++ b/client/src/app/site/users/services/user-repository.service.ts
@@ -64,6 +64,12 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
             updateUser.username = viewUser.username;
         }
 
+        // if the update user does not have a gender-field, send gender as empty string.
+        // This allow to delete a previously selected gender
+        if (!updateUser.gender) {
+            updateUser.gender = '';
+        }
+
         return await this.dataSend.updateModel(updateUser);
     }