diff --git a/src/components/Exploration/components/Breadcrumb.tsx b/src/components/Exploration/components/Breadcrumb.tsx
index 85059af09..d297f1f12 100644
--- a/src/components/Exploration/components/Breadcrumb.tsx
+++ b/src/components/Exploration/components/Breadcrumb.tsx
@@ -1,17 +1,28 @@
 import React from 'react'
 import useBreadcrumb from '../hooks/useBreadcrumb'
-import { Breadcrumbs, Link } from '@mui/material'
+import { Breadcrumbs, Link, Typography } from '@mui/material'
+import { Link as RouterLink } from 'react-router-dom'
 
 const Breadcrumb = () => {
   const items = useBreadcrumb()
   return (
     // TODO: style
     <Breadcrumbs>
-      {items.map((item, index) => (
-        <Link key={index} href={item.url}>
-          {item.label}
-        </Link>
-      ))}
+      {items.map((item, index) => {
+        // Si c'est le dernier item, pas de lien
+        const isLast = index === items.length - 1
+        if (isLast) {
+          return <Typography key={index}>{item.label}</Typography>
+        }
+
+        return item.url ? (
+          <Link key={index} component={RouterLink} to={item.url}>
+            {item.label}
+          </Link>
+        ) : (
+          <Typography key={index}>{item.label}</Typography>
+        )
+      })}
     </Breadcrumbs>
   )
 }
diff --git a/src/components/Exploration/components/CohortsList.tsx b/src/components/Exploration/components/CohortsList.tsx
index 3e13d6478..2364a7a50 100644
--- a/src/components/Exploration/components/CohortsList.tsx
+++ b/src/components/Exploration/components/CohortsList.tsx
@@ -2,7 +2,7 @@ import React, { useContext, useState } from 'react'
 import { useAppSelector } from 'state'
 
 import { Box, Grid, IconButton, TableRow, Tooltip, Typography } from '@mui/material'
-import { useNavigate, useSearchParams } from 'react-router-dom'
+import { useNavigate, useParams, useSearchParams } from 'react-router-dom'
 import ResearchesTable from './Table'
 import { Cohort, CohortJobStatus, Column } from 'types'
 import { TableCellWrapper } from 'components/ui/TableCell/styles'
@@ -19,12 +19,14 @@ import ColorizeIcon from '@mui/icons-material/Colorize'
 import EditIcon from '@mui/icons-material/Edit'
 import DeleteOutlineIcon from '@mui/icons-material/DeleteOutline'
 import ActionMenu from './ActionMenu'
+import useRequest from '../hooks/useRequest'
 
 // TODO: il y a un hook useCohortsList, à checker à la rentrée
 
 const CohortsList = () => {
   const appConfig = useContext(AppConfig)
   const navigate = useNavigate()
+  const { projectId, requestId } = useParams()
   const [searchParams, setSearchParams] = useSearchParams()
   const searchInput = searchParams.get('searchInput') ?? ''
   const startDate = searchParams.get('startDate') ?? undefined
@@ -32,7 +34,8 @@ const CohortsList = () => {
   const page = parseInt(searchParams.get('page') ?? '1', 10)
   const maintenanceIsActive = useAppSelector((state) => state?.me?.maintenance?.active ?? false)
 
-  const { cohortsList, total, loading } = useCohorts('', searchInput, startDate, endDate)
+  const { request: parentRequest, requestLoading, requestIsError } = useRequest(requestId)
+  const { cohortsList, total, loading } = useCohorts(requestId ?? '', searchInput, startDate, endDate)
 
   // TODO: add les params pour les filtres exclusifs aux cohortes + bien penser à les suppr en changeant d'onglet
   // TODO: ne pas oublier les websockets
@@ -40,7 +43,7 @@ const CohortsList = () => {
   const columns: Column[] = [
     { label: '', align: 'left' },
     { label: 'nom de la cohorte', align: 'left' },
-    { label: 'requête parent' }, // TODO: conditionner à si onglet cohortes, cliquable ou pas?
+    ...(!requestId ? [{ label: 'requête parent' }] : []), //TODO: cliquable ou pas?
     { label: 'statut' },
     { label: 'nb de patients' },
     { label: 'estimation du nombre de patients ap-hp' },
@@ -90,9 +93,22 @@ const CohortsList = () => {
   }
 
   return (
-    <Grid container gap="50px">
-      <Typography>CohortsList</Typography>
-
+    <Grid container gap="20px">
+      {requestId && (
+        <Box display={'flex'} justifyContent={'center'} width={'100%'} alignItems={'center'}>
+          <Typography fontWeight={'bold'} fontSize={'24px'} fontFamily={"'Montserrat', sans-serif"}>
+            {parentRequest?.name}
+          </Typography>
+          <Typography>{parentRequest?.description}</Typography>
+          {/* TODO: ajouter les actions sur projet parent */}
+          <IconButton>
+            <EditIcon />
+          </IconButton>
+          <IconButton>
+            <DeleteOutlineIcon />
+          </IconButton>
+        </Box>
+      )}
       {/* TODO: add circular progress */}
 
       <ResearchesTable columns={columns} page={page} setPage={handlePageChange} total={total}>
@@ -119,7 +135,7 @@ const CohortsList = () => {
             <TableRow
               key={cohort.name}
               sx={{ borderBottom: '1px solid #000', borderRadius: 20 }}
-              onClick={() => onClickRow(cohort)}
+              // onClick={() => onClickRow(cohort)}
             >
               <TableCellWrapper align="left" headCell>
                 <IconButton
@@ -186,14 +202,27 @@ const CohortsList = () => {
                   <ActionMenu actions={actions} />
                 </Box>
               </TableCellWrapper>
-              <TableCellWrapper>{cohort.request}</TableCellWrapper>
+              {!requestId && <TableCellWrapper>{cohort.request}</TableCellWrapper>}
               <TableCellWrapper>{cohort.request_job_status}</TableCellWrapper>
               <TableCellWrapper>{displayDigit(cohort.result_size)}</TableCellWrapper>
               <TableCellWrapper>{getGlobalEstimation(cohort)}</TableCellWrapper>
               <TableCellWrapper>{formatDate(cohort.created_at, true)}</TableCellWrapper>
               <TableCellWrapper>
-                <Button endIcon={<ArrowRightAltIcon />} onClick={() => console.log('hey coucou')}>
-                  {/* {cohort.samples} échantillons */}
+                {/* TODO: rendre non cliquable si pas d'enfant dispo */}
+                <Button
+                  // endIcon={cohortTotal >= 1 && <ArrowRightAltIcon />}
+                  onClick={() =>
+                    // TODO: pourquoi le preventDefault ne fonctionne pas ?
+                    {
+                      if (projectId && requestId)
+                        navigate(`/researches/projects/${projectId}/${requestId}/${cohort.uuid}${location.search}`)
+                      if (!projectId && requestId)
+                        navigate(`/researches/requests/${requestId}/${cohort.uuid}${location.search}`)
+                      if (!projectId && !requestId) navigate(`/researches/cohorts/${cohort.uuid}${location.search}`)
+                    }
+                  }
+                >
+                  0 échantillon
                 </Button>
               </TableCellWrapper>
             </TableRow>
diff --git a/src/components/Exploration/components/RequestsList.tsx b/src/components/Exploration/components/RequestsList.tsx
index 6057fb391..a6507fc77 100644
--- a/src/components/Exploration/components/RequestsList.tsx
+++ b/src/components/Exploration/components/RequestsList.tsx
@@ -9,7 +9,6 @@ import Button from 'components/ui/Button'
 import ArrowRightAltIcon from '@mui/icons-material/ArrowRightAlt'
 import useRequests from '../hooks/useRequests'
 import { formatDate } from 'utils/formatDate'
-import { Delete, Edit } from '@mui/icons-material'
 import ActionMenu from './ActionMenu'
 import EditIcon from '@mui/icons-material/Edit'
 import DeleteOutlineIcon from '@mui/icons-material/DeleteOutline'
@@ -31,7 +30,6 @@ const RequestsList = () => {
   const page = parseInt(searchParams.get('page') ?? '1', 10)
   const maintenanceIsActive = useAppSelector((state) => state?.me?.maintenance?.active ?? false)
 
-  console.log('test useProject(projectId)', useProject(projectId))
   const { project: parentProject, projectLoading, projectIsError } = useProject(projectId)
   const { requestsList, total, loading } = useRequests(projectId, searchInput, startDate, endDate, page)
 
@@ -40,11 +38,9 @@ const RequestsList = () => {
     setSearchParams(searchParams)
   }
 
-  console.log('test parentProject', parentProject)
-
   const columns: Column[] = [
     { label: 'nom de la requête', align: 'left' },
-    { label: 'projet' }, // TODO: conditionner à si onglet requêtes + réfléchir si cliquable ou pas?
+    ...(!projectId ? [{ label: 'projet' }] : []), // TODO: réfléchir si cliquable ou pas?
     { label: 'date de modification' },
     { label: 'nb de cohortes' }
   ]
@@ -97,10 +93,10 @@ const RequestsList = () => {
           <Typography>{parentProject?.description}</Typography>
           {/* TODO: ajouter les actions sur projet parent */}
           <IconButton>
-            <Edit />
+            <EditIcon />
           </IconButton>
           <IconButton>
-            <Delete />
+            <DeleteOutlineIcon />
           </IconButton>
         </Box>
       )}
@@ -116,7 +112,7 @@ const RequestsList = () => {
               <TableRow
                 key={request.uuid}
                 sx={{ borderBottom: '1px solid #000', borderRadius: 20 }}
-                onClick={() => navigate(`/cohort/new/${request.uuid}`)}
+                // onClick={() => navigate(`/cohort/new/${request.uuid}`)}
               >
                 <TableCellWrapper align="left" headCell>
                   {getRequestName(request)}
@@ -131,16 +127,21 @@ const RequestsList = () => {
                   </Tooltip>
                   <ActionMenu actions={actions} />
                 </TableCellWrapper>
-                <TableCellWrapper>{request.parent_folder}</TableCellWrapper>
+                {!projectId && <TableCellWrapper>{request.parent_folder}</TableCellWrapper>}
                 <TableCellWrapper>{formatDate(request.created_at, true)}</TableCellWrapper>
                 <TableCellWrapper>
                   {/* TODO: rendre non cliquable si pas d'enfant dispo */}
                   <Button
                     endIcon={cohortTotal >= 1 && <ArrowRightAltIcon />}
                     onClick={() =>
+                      // TODO: pourquoi le preventDefault ne fonctionne pas ?
                       // TODO: gérer où on navigate en fonction de l'onglet où l'on se trouve
                       // à obtenir à partir de l'url
-                      navigate('')
+                      navigate(
+                        projectId
+                          ? `/researches/projects/${projectId}/${request.uuid}${location.search}`
+                          : `/researches/requests/${request.uuid}${location.search}`
+                      )
                     }
                   >
                     {cohortTotal} cohorte{cohortTotal > 1 && 's'}
diff --git a/src/components/Exploration/hooks/useBreadcrumb.tsx b/src/components/Exploration/hooks/useBreadcrumb.tsx
index 4028eef4e..f6a2e4131 100644
--- a/src/components/Exploration/hooks/useBreadcrumb.tsx
+++ b/src/components/Exploration/hooks/useBreadcrumb.tsx
@@ -1,25 +1,48 @@
-import React from 'react'
-import { useLocation } from 'react-router'
+import { useLocation, useParams } from 'react-router-dom'
+import useProject from './useProject'
+import useRequest from './useRequest'
 
 const useBreadCrumb = () => {
+  const { projectId, requestId, cohortId } = useParams()
   const location = useLocation()
-  const pathParts = location.pathname.split('/').filter(Boolean)
-  console.log('test pathParts', pathParts)
+
+  const { project } = useProject(projectId)
+  const { request } = useRequest(requestId)
+  // TODO: same with cohorts
 
   const items = []
+  if (location.pathname.includes('/projects')) {
+    items.push({ label: 'Tous mes projets', url: '/researches/projects' })
+
+    if (projectId && project) {
+      items.push({
+        label: `Projet ${project.name}`,
+        url: `/researches/projects/${projectId}`
+      })
 
-  // TODO: clean et externaliser
-  // TODO: faire une fonction plus jolie pour trouver où je suis et récup les noms
-  if (pathParts[1] === 'projects') {
-    items.push({ label: 'Mes projets', url: 'researches/projects' })
-  } else if (pathParts[1] === 'requests') {
-    items.push({ label: 'Mes requêtes', url: 'researches/requests' })
-  } else if (pathParts[1] === 'cohorts') {
-    items.push({ label: 'Mes cohortes', url: 'researches/cohorts' })
-  } else if (pathParts[1] === 'samples') {
-    items.push({ label: 'Mes échantillons', url: 'researches/samples' })
+      if (requestId && request) {
+        items.push({
+          label: `Requête ${request.name}`,
+          url: `/researches/projects/${projectId}/${requestId}`
+        })
+      }
+    }
   }
 
+  if (location.pathname.includes('/requests')) {
+    items.push({ label: 'Requêtes', url: '/researches/requests' })
+    if (requestId && request) {
+      items.push({
+        label: `Requête ${request.name}`,
+        url: `/researches/${requestId}`
+      })
+    }
+  }
+
+  if (location.pathname.includes('/cohorts')) {
+    items.push({ label: 'Mes Cohortes', url: '/researches/requests' })
+    // TODO: a adapter
+  }
   return items
 }
 
diff --git a/src/components/Exploration/hooks/useCohorts.tsx b/src/components/Exploration/hooks/useCohorts.tsx
index 8b09b2279..ec89a5ad6 100644
--- a/src/components/Exploration/hooks/useCohorts.tsx
+++ b/src/components/Exploration/hooks/useCohorts.tsx
@@ -1,45 +1,52 @@
-import React, { useEffect, useState } from 'react'
+import { useQuery } from '@tanstack/react-query'
 import services from 'services/aphp'
-import { Cohort } from 'types'
 import { CohortsType } from 'types/cohorts'
 import { Direction, Order } from 'types/searchCriterias'
 
-const useCohorts = (parentRequestId: string, searchInput: string, startDate?: string, endDate?: string, page = 1) => {
-  const [cohortsList, setCohortsList] = useState<Cohort[]>([])
-  const [total, setTotal] = useState(0)
-  const [loading, setLoading] = useState(false)
-
+const useCohorts = (parentId: string, searchInput: string, startDate?: string, endDate?: string, page = 1) => {
   // TODO: à externaliser
   const fetchCohortsList = async () => {
     // TODO: modifier le service de sorte à ajouter les filtres + try/catch
     const rowsPerPage = 20
     const offset = (page - 1) * rowsPerPage
     const cohortsList = await services.projects.fetchCohortsList(
-      {
-        startDate: startDate ?? null,
-        endDate: endDate ?? null,
-        status: [],
-        favorite: CohortsType.ALL,
-        minPatients: null,
-        maxPatients: null
-      },
-      searchInput,
+      parentId
+        ? {
+            startDate: null,
+            endDate: null,
+            status: [],
+            favorite: CohortsType.ALL,
+            minPatients: null,
+            maxPatients: null,
+            parentId
+          }
+        : {
+            startDate: startDate ?? null,
+            endDate: endDate ?? null,
+            status: [],
+            favorite: CohortsType.ALL,
+            minPatients: null,
+            maxPatients: null,
+            parentId
+          },
+      !parentId ? searchInput : '',
       { orderBy: Order.CREATED_AT, orderDirection: Direction.DESC },
       rowsPerPage,
       offset
       //   AbortSignal???
     )
-    console.log('test cohortsList', cohortsList)
-    setCohortsList(cohortsList.results)
-    setTotal(cohortsList.count)
+    return cohortsList
   }
 
-  useEffect(() => {
-    // setLoading(true)
-    console.log('test fetchCohortsList()', fetchCohortsList())
-  }, [parentRequestId, searchInput, startDate, endDate, page])
+  const { data, isLoading, isError, error, refetch } = useQuery({
+    queryKey: ['cohorts', searchInput, startDate, endDate, page],
+    queryFn: fetchCohortsList
+  })
+
+  const cohortsList = data?.results ?? []
+  const total = data?.count ?? 0
 
-  return { cohortsList, total, loading }
+  return { cohortsList, total, loading: isLoading, isError, error, refetch }
 }
 
 export default useCohorts
diff --git a/src/components/Exploration/hooks/useCounts.tsx b/src/components/Exploration/hooks/useCounts.tsx
index 32a7368f5..e35406914 100644
--- a/src/components/Exploration/hooks/useCounts.tsx
+++ b/src/components/Exploration/hooks/useCounts.tsx
@@ -1,39 +1,76 @@
-import React, { useEffect, useState } from 'react'
+import { useQueries } from '@tanstack/react-query'
+import services from 'services/aphp'
+import { CohortsType } from 'types/cohorts'
+import { Direction, Order } from 'types/searchCriterias'
 
-const useCounts = (searchTerm: string, startDate?: string | null, endDate?: string | null) => {
-  const [data, setData] = useState<{
-    projectsCount: number
-    requestsCount: number
-    cohortsCount: number
-    samplesCount: number
-  }>({
-    projectsCount: 0,
-    requestsCount: 0,
-    cohortsCount: 0,
-    samplesCount: 0
+const useCounts = (searchInput: string, startDate?: string, endDate?: string) => {
+  const results = useQueries({
+    queries: [
+      {
+        queryKey: ['projectsCount', searchInput, startDate, endDate],
+        queryFn: async () => {
+          const res = await services.projects.fetchProjectsList(searchInput, startDate, endDate, 0)
+          return res.count ?? 0
+        }
+      },
+      {
+        queryKey: ['requestsCount', searchInput, startDate, endDate],
+        queryFn: async () => {
+          const res = await services.projects.fetchRequestsList('', searchInput, startDate, endDate, 0)
+          return res.count ?? 0
+        }
+      },
+      {
+        queryKey: ['cohortsCount', searchInput, startDate, endDate],
+        queryFn: async () => {
+          const res = await services.projects.fetchCohortsList(
+            {
+              startDate: startDate ?? null,
+              endDate: endDate ?? null,
+              status: [],
+              favorite: CohortsType.ALL,
+              minPatients: null,
+              maxPatients: null
+            },
+            searchInput,
+            { orderBy: Order.CREATED_AT, orderDirection: Direction.DESC },
+            0
+          )
+          return res.count ?? 0
+        }
+      },
+      {
+        queryKey: ['samplesCount', searchInput, startDate, endDate],
+        queryFn: async () => {
+          // TODO: A COMPLETER PLUS TARD
+          return 3
+        }
+      }
+    ]
   })
 
-  useEffect(() => {
-    if (!searchTerm && !startDate && !endDate) {
-      setData({ projectsCount: 0, requestsCount: 0, cohortsCount: 0, samplesCount: 0 })
-      return
-    }
+  const projectsCountQuery = results[0]
+  const requestsCountQuery = results[1]
+  const cohortsCountQuery = results[2]
+  const samplesCountQuery = results[3]
 
-    const fetchCounts = async () => {
-      // TODO: API call
+  const loading =
+    projectsCountQuery.isLoading ||
+    requestsCountQuery.isLoading ||
+    cohortsCountQuery.isLoading ||
+    samplesCountQuery.isLoading
 
-      setData({
-        projectsCount: searchTerm ? 5 : 0,
-        requestsCount: searchTerm ? 20 : 0,
-        cohortsCount: searchTerm ? 3 : 0,
-        samplesCount: searchTerm ? 4 : 0
-      })
-    }
+  const isError =
+    projectsCountQuery.isError || requestsCountQuery.isError || cohortsCountQuery.isError || samplesCountQuery.isError
 
-    fetchCounts()
-  }, [searchTerm, startDate, endDate])
-
-  return data
+  return {
+    loading,
+    isError,
+    projectsCount: projectsCountQuery.data ?? 0,
+    requestsCount: requestsCountQuery.data ?? 0,
+    cohortsCount: cohortsCountQuery.data ?? 0,
+    samplesCount: samplesCountQuery.data ?? 0
+  }
 }
 
 export default useCounts
diff --git a/src/components/Exploration/hooks/useRequest.tsx b/src/components/Exploration/hooks/useRequest.tsx
new file mode 100644
index 000000000..4103fdccc
--- /dev/null
+++ b/src/components/Exploration/hooks/useRequest.tsx
@@ -0,0 +1,24 @@
+import services from 'services/aphp'
+import { useQuery } from '@tanstack/react-query'
+
+const useRequest = (requestId?: string) => {
+  const { data, isLoading, isError, error, refetch } = useQuery({
+    queryKey: ['request', requestId],
+    enabled: !!requestId, // ça veut dire qu'on fait pas l'appel si pas de requestId
+    queryFn: async () => {
+      if (!requestId) return null
+      const requestData = await services.projects.fetchRequest(requestId)
+      return requestData
+    }
+  })
+
+  return {
+    request: data,
+    requestLoading: isLoading,
+    requestIsError: isError,
+    error,
+    refetch
+  }
+}
+
+export default useRequest
diff --git a/src/components/Exploration/hooks/useRequests.tsx b/src/components/Exploration/hooks/useRequests.tsx
index 637f97035..2ee89f52b 100644
--- a/src/components/Exploration/hooks/useRequests.tsx
+++ b/src/components/Exploration/hooks/useRequests.tsx
@@ -2,7 +2,7 @@ import { useQuery } from '@tanstack/react-query'
 import services from 'services/aphp'
 
 const useRequests = (
-  projectId: string | undefined,
+  parentId: string | undefined,
   searchInput: string,
   startDate?: string,
   endDate?: string,
@@ -13,12 +13,19 @@ const useRequests = (
     // TODO: modifier le service de sorte à ajouter les filtres + try/catch
     const rowsPerPage = 20
     const offset = (page - 1) * rowsPerPage
-    const requestsList = await services.projects.fetchRequestsList(rowsPerPage, offset)
+    const requestsList = await services.projects.fetchRequestsList(
+      parentId,
+      searchInput,
+      startDate,
+      endDate,
+      rowsPerPage,
+      offset
+    )
     return requestsList
   }
 
   const { data, isLoading, isError, error, refetch } = useQuery({
-    queryKey: ['requests', searchInput, startDate, endDate],
+    queryKey: ['requests', searchInput, startDate, endDate, page],
     queryFn: fetchRequestsList
   })
 
diff --git a/src/services/aphp/serviceProjects.ts b/src/services/aphp/serviceProjects.ts
index 366852e23..5dc35ba1a 100644
--- a/src/services/aphp/serviceProjects.ts
+++ b/src/services/aphp/serviceProjects.ts
@@ -69,6 +69,8 @@ export interface IServiceProjects {
    */
   deleteProject: (deletedProject: ProjectType) => Promise<ProjectType>
 
+  fetchRequest: (request_id: string) => Promise<RequestType>
+
   /**
    * Retourne la liste de requete d'un practitioner
    *
@@ -83,6 +85,10 @@ export interface IServiceProjects {
    *   - results: Liste de requete récupéré
    */
   fetchRequestsList: (
+    parentId?: string,
+    searchInput?: string,
+    startDate?: string,
+    endDate?: string,
     limit?: number,
     offset?: number
   ) => Promise<{
@@ -228,6 +234,10 @@ const servicesProjects: IServiceProjects = {
   fetchProject: async (projectId) => {
     return (await apiBack.get(`/cohort/folders/${projectId}/`)).data
   },
+  //TODO: temp, à clean
+  fetchRequest: async (requestId) => {
+    return (await apiBack.get(`/cohort/requests/${requestId}/`)).data
+  },
   fetchProjectsList: async (searchInput, startDate, endDate, limit, offset) => {
     let search = `?ordering=created_at`
     if (limit) {
@@ -300,7 +310,8 @@ const servicesProjects: IServiceProjects = {
     }
   },
 
-  fetchRequestsList: async (limit, offset) => {
+  fetchRequestsList: async (parentId, searchInput, startDate, endDate, limit, offset) => {
+    // TODO: temp, à clean
     let search = `?`
     if (limit) {
       search += `limit=${limit}`
@@ -308,6 +319,18 @@ const servicesProjects: IServiceProjects = {
     if (offset) {
       search += search === '?' ? `offset=${offset}` : `&offset=${offset}`
     }
+    if (!parentId && searchInput !== '') {
+      search += `&search=${searchInput}`
+    }
+    if (!parentId && startDate) {
+      search += `&min_fhir_datetime=${startDate}`
+    }
+    if (!parentId && endDate) {
+      search += `&max_fhir_datetime=${endDate}`
+    }
+    if (parentId) {
+      search += `&parent_folder=${parentId}`
+    }
 
     const fetchRequestsListResponse = (await apiBack.get<{
       count: number
@@ -429,7 +452,7 @@ const servicesProjects: IServiceProjects = {
       accumulator ? `${accumulator}&${currentValue}` : currentValue ? currentValue : accumulator
 
     let options: string[] = []
-    const { status, favorite, minPatients, maxPatients, startDate, endDate } = filters
+    const { status, favorite, minPatients, maxPatients, startDate, endDate, parentId } = filters
     const _status = status.map((stat) => stat.code)
 
     if (limit) options = [...options, `limit=${limit}`]
@@ -441,6 +464,7 @@ const servicesProjects: IServiceProjects = {
     if (maxPatients) options = [...options, `max_result_size=${maxPatients}`]
     if (startDate) options = [...options, `min_fhir_datetime=${startDate}`]
     if (endDate) options = [...options, `max_fhir_datetime=${endDate}`]
+    if (parentId) options = [...options, `request_id=${parentId}`]
     if (favorite !== CohortsType.ALL)
       options = [...options, `favorite=${favorite === CohortsType.FAVORITE ? 'true' : 'false'}`]
 
diff --git a/src/types/searchCriterias.ts b/src/types/searchCriterias.ts
index 4973aa40c..ceb89beed 100644
--- a/src/types/searchCriterias.ts
+++ b/src/types/searchCriterias.ts
@@ -323,6 +323,7 @@ export interface CohortsFilters {
   maxPatients: null | string
   startDate: null | string
   endDate: null | string
+  parentId?: string
 }
 
 export interface SearchCriterias<F> {
diff --git a/src/views/MyResearches/index.tsx b/src/views/MyResearches/index.tsx
index 9b2469534..918561dbe 100644
--- a/src/views/MyResearches/index.tsx
+++ b/src/views/MyResearches/index.tsx
@@ -32,8 +32,8 @@ const MyResearches = () => {
 
   const { projectsCount, requestsCount, cohortsCount, samplesCount } = useCounts(
     searchInput,
-    startDateParam,
-    endDateParam
+    startDateParam ?? '',
+    endDateParam ?? ''
   )
 
   // TODO: tout ça à externaliser