diff --git a/components/home.js b/components/home.js
index ad4dce1..e57633d 100644
--- a/components/home.js
+++ b/components/home.js
@@ -9,7 +9,6 @@ import { getCycleDaysSortedByDate } from '../db'
 import { getFertilityStatusForDay } from '../lib/sympto-adapter'
 import styles from '../styles'
 import AppText, { AppTextLight } from './app-text'
-import nothingChanged from '../db/db-unchanged'
 import DripHomeIcon from '../assets/drip-home-icons'
 
 const HomeButton = ({ backgroundColor, children }) => {
@@ -42,23 +41,6 @@ export default class Home extends Component {
     }
 
     this.cycleDays = getCycleDaysSortedByDate()
-    this.cycleDays.addListener(this.updateState)
-  }
-
-  updateState = (_, changes) => {
-    if (nothingChanged(changes)) return
-    const prediction = this.getBleedingPrediction()
-    const fertilityStatus = getFertilityStatusForDay(this.todayDateString)
-    this.setState({
-      cycleDayNumber: this.getCycleDayNumber(this.todayDateString),
-      predictionText: determinePredictionText(prediction),
-      bleedingPredictionRange: getBleedingPredictionRange(prediction),
-      ...fertilityStatus
-    })
-  }
-
-  componentWillUnmount() {
-    this.cycleDays.removeListener(this.updateState)
   }
 
   passTodayTo(componentName) {
diff --git a/lib/sympto-adapter.js b/lib/sympto-adapter.js
index 628ea2b..980cbfe 100644
--- a/lib/sympto-adapter.js
+++ b/lib/sympto-adapter.js
@@ -1,16 +1,17 @@
 import getFertilityStatus from './sympto'
 import cycleModule from './cycle'
-import { fertilityStatus } from '../i18n/en/labels'
 import { useCervixObservable } from '../local-storage'
+import { fertilityStatus as labels } from '../i18n/en/labels'
 
 export function getFertilityStatusForDay(dateString) {
   const status = getCycleStatusForDay(dateString)
   if (!status) return {
-    status: fertilityStatus.fertile,
+    status: labels.fertile,
     phase: null
   }
 
-  const phaseNameForDay = Object.keys(status.phases).find(phaseName => {
+  const phases = Object.keys(status.phases)
+  const phaseNameForDay = phases.find(phaseName => {
     const phase = status.phases[phaseName]
     const dayIsAfterPhaseStart = dateString >= phase.start.date
     let dayIsBeforePhaseEnd
@@ -22,6 +23,12 @@ export function getFertilityStatusForDay(dateString) {
     return dayIsAfterPhaseStart && dayIsBeforePhaseEnd
   })
 
+  // if there's only cycle data for the pre phase and the target day is after its end,
+  // the day is in the peri phase
+  if (phases.length === 1 && phases[0] === 'preOvulatory' && !phaseNameForDay) {
+    return formatStatus('periOvulatory', dateString, {phases: {periOvulatory: {}}})
+  }
+
   return formatStatus(phaseNameForDay, dateString, status)
 }
 
@@ -58,27 +65,32 @@ function formatStatus(phaseNameForDay, dateString, status) {
   const mapping = {
     preOvulatory: () => {
       return {
-        status: fertilityStatus.infertile,
+        status: labels.infertile,
         phase: 1,
-        statusText: fertilityStatus.preOvuText
+        statusText: labels.preOvuText
       }
     },
     periOvulatory: (dateString, status) => {
-      const phaseEnd = status.phases.periOvulatory.end
+      //there might not actually be any data for the phase
+      const peri = status.phases.periOvulatory
+      const phaseEnd = peri && peri.end
+      let s
       if (phaseEnd && phaseEnd.date === dateString) {
-        return fertilityStatus.fertileUntilEvening
+        s = labels.fertileUntilEvening
+      } else {
+        s = labels.fertile
       }
       return {
-        status: fertilityStatus.fertile,
+        status: s,
         phase: 2,
-        statusText: fertilityStatus.periOvuText
+        statusText: labels.periOvuText
       }
     },
     postOvulatory: (dateString, status) => {
       return {
-        status: fertilityStatus.infertile,
+        status: labels.infertile,
         phase: 3,
-        statusText: fertilityStatus.postOvuText(status.temperatureShift.rule)
+        statusText: labels.postOvuText(status.temperatureShift.rule)
       }
     }
   }