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We analysed its impact on condom use and pregnancy events.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In all, 3023 women (aged 18\u201349\u00a0years) participating in the Swiss HIV Cohort Study were included. Observation time was divided into pre\u2010 and post\u2010Swiss statement phases (July 2005\u2013December 2008 and January 2009\u2013December 2019). We used descriptive statistics, Poisson interrupted time series analysis for pregnancy incidence, and logistic regression to identify predictors of live births, spontaneous and induced abortions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Condomless sex in sexually active women increased from 25% in 2005 to 75% in 2019, while pregnancy incidence did not. Women after 2008 experienced higher spontaneous abortion rates (12.1% vs. 17.2%,<jats:italic>p\u00a0<\/jats:italic>=\u00a00.02) while induced abortion and live birth rates did not change significantly. Spontaneous abortions were more common in older women [adjusted odds ratio (aOR) = 1.4, 95% CI: 1.2\u20131.7,<jats:italic>p\u00a0<\/jats:italic>&lt;\u00a00.001], in women consuming alcohol (aOR = 2.8, 95% CI: 1.9\u20134.1,<jats:italic>p\u00a0<\/jats:italic>&lt;\u00a00.001) and in those with non\u2010suppressed viral load (aOR = 0.2, 95% CI: 0.1\u20130.4,<jats:italic>p\u00a0<\/jats:italic>\u2264\u00a00.001). Induced abortions were more likely in women with depression (aOR = 3.4, 95% CI: 1.8\u20136.3,<jats:italic>p\u00a0<\/jats:italic>&lt;\u00a00.001) and non\u2010suppressed viral load (aOR = 0.3, 95% CI: 0.2\u20130.7,<jats:italic>p\u00a0<\/jats:italic>=\u00a00.003).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The publication of the Swiss statement resulted in more condomless sex in heterosexual women, but this did not result in a higher incidence of pregnancy. Maternal age and spontaneous abortion rates increased over time, while induced abortion rates were not significantly affected. Women living with HIV in Switzerland have an unmet need regarding family planning counselling.<\/jats:p><\/jats:sec>","DOI":"10.1111\/hiv.13152","type":"journal-article","created":{"date-parts":[[2021,9,3]],"date-time":"2021-09-03T06:02:39Z","timestamp":1630648959000},"page":"60-69","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Decrease of condom use in heterosexual couples and its impact on pregnancy rates: the Swiss HIV Cohort Study (SHCS)"],"prefix":"10.1111","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9308-7130","authenticated-orcid":false,"given":"Anna","family":"Hachfeld","sequence":"first","affiliation":[{"name":"Department of Infectious Diseases Bern University Hospital and University of Bern Bern Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrew","family":"Atkinson","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases Bern University Hospital and University of Bern Bern Switzerland"},{"name":"Paediatric Pharmacology and Pharmacometrics University of Basel Children\u2019s Hospital Basel Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexandra","family":"Calmy","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases Geneva University Hospitals HIV\/AIDS Unit Geneva Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bego\u00f1a Martinez","family":"de Tejada","sequence":"additional","affiliation":[{"name":"Obstetrics Division Department of Pediatrics, Gynecology and Obstetrics Faculty of Medicine University Hospitals of Geneva Geneva Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Barbara","family":"Hasse","sequence":"additional","affiliation":[{"name":"Division of Infectious Diseases and Hospital Epidemiology University Hospital and University of Zurich Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paolo","family":"Paioni","sequence":"additional","affiliation":[{"name":"Division of Infectious Diseases and Hospital Epidemiology University Children\u2019s Hospital Zurich Zurich Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian R.","family":"Kahlert","sequence":"additional","affiliation":[{"name":"Children\u2019s Hospital of Eastern Switzerland and Cantonal Hospital St. Gallen Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"No\u00e9mie","family":"Boillat\u2010Blanco","sequence":"additional","affiliation":[{"name":"Service of Infectious Diseases University Hospital Lausanne Lausanne Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcel","family":"Stoeckle","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases University Hospital Basel Basel Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9337-900X","authenticated-orcid":false,"given":"Karoline","family":"Aebi\u2010Popp","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases Bern University Hospital and University of Bern Bern Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"name":"the Swiss HIV Cohort Study, the Swiss Mother, Child HIV Cohort Study (MoCHiV)","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,9,2]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.4414\/bms.2008.13252"},{"issue":"304","key":"e_1_2_10_3_1","article-title":"HIV is not transmitted under fully suppressive therapy: The Swiss Statement \u2013 eight years later","volume":"146","author":"Vernazza P","year":"2016","journal-title":"Swiss Med Wkly"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1086\/656809"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa1600693"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.2016.5148"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1093\/ofid\/ofv077"},{"key":"e_1_2_10_8_1","doi-asserted-by":"crossref","unstructured":"Aebi\u2010PoppK MercantiV VoideC et al.Neglect of attention to reproductive health in women with HIV infection: contraceptive use and unintended pregnancies in the Swiss HIV Cohort Study [Internet]. 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