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          <titl xml:lang="sv">Fertilitet hos kvinnliga frisörer- frisörkohorten</titl>
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        <AuthEnty affiliation="Laboratory Medicine, Lund University" xml:lang="en">Axmon, Anna
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      <abstract xml:lang="en">The study investigated whether working as a hairdresser has a negative impact on fertility, measured as time to pregnancy and miscarriage risk. Methods: Self-administered questionnaires were sent to 5289 Swedish hairdressers (response rate 50%) and to 5299 age-matched women from the general Swedish population (response rate 54%). Information was collected on time to pregnancy or trying time for women who had tried, but failed, to conceive at the time of the study. The outcome of the pregnancy was determined and categorized as either miscarriage or stillbirth or live birth. The hairdressers were compared with the referents with respect to these two outcomes. Within the hairdresser cohort, the effects of hair treatments, as well as physical workload and stress were investigated. Results: The hairdressers were less successful than the reference cohort in conceiving (fecundability ratio 0.91, 95% confidence interval 0.83-0.99). The effect was reduced after first-month conceptions were excluded, the indication being that the effect may be the result of birth control bias. Within the hairdresser cohort, a selfperceived stressful work situation seemed to prolong the time to pregnancy. No effects were found for the different chemical hair treatments. There was no cohort difference with respect to miscarriage risk (odds ratio 1.12, 95% confidence interval 0.88-1.42), but miscarriage risks were increased for most of the hair treatments and for self-perceived stressful work situations. However, none of these effects were statistically significant. Conclusions: The present study indicates a negative impact on time to pregnancy and miscarriage risk for working as a hairdresser.  Purpose:  To investigate whether working as a hairdresser has a negative impact on female fertility</abstract><abstract xml:lang="sv">Studien undersökte huruvida arbete som hårfrisör har en negativ inverkan på fertilitet, mätt som tid för att bli gravid och risk för missfall. Metod: Självadministrerade enkäter sändes till 5289 svenska hårfrisörer (svarsfrekvens 50%) och till 5299 åldersmatchade kvinnor ur den svenska totalpopulationen (svarsfrekvens 54%). Information om tid till graviditet eller tid för försök bland kvinnor som försökt men inte lyckats bli gravida vid tiden för studiens genomförande. Utgången av graviditeten bedömdes och kategoriserades som antingen missfall, dödfödd eller levande vid födseln. Hårfrisörskorna jämfördes med referenspersonerna i förhållande till dessa två resultatvariabler. Inom hårfrisörgruppen undersöktes effekten av såväl hårbehandling som fysisk arbetsbelastning och stress.Resultat: Hårfrisörerna var mindre framgångsrika än referenskohorten i att bli gravida (fertilitetsratio 0.91, 95% confidence interval 0.83-0.99).  Effekten var reducerad sedan konception under första månaden exkluderats, vilket indikerar att effekten kan vara resultat av födelsekontroll bias. En självupplevd stressig arbetssituation inom hårfrisörs-kohorten verkar förlänga tiden till graviditet. Ingen effekt hittades för de olika kemiska hårbehandlingarna. Det fanns ingen skillnad mellan kohorterna i förhållande till risk för missfall (odds ratio: 1.12, 95% konfidensintervall 0,88-1,42), men risken för missfall ökade med de flesta hårbehandlingarna och för självupplevd stressig arbetssituation. Ingen av dessa effekter var statistiskt signifikanta. Slutsats: Denna studie indikerar en negativ påverkan på tid till graviditet och risk för missfall för arbete som hårfrisörska.  Syfte:  Att undersöka om arbete som frisör har negativ inverkan på kvinnlig fertilitet</abstract>
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