{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T16:09:56Z","timestamp":1770221396356,"version":"3.49.0"},"reference-count":27,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2019,12,17]],"date-time":"2019-12-17T00:00:00Z","timestamp":1576540800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Background and objectives: Sex education is a necessity and a right of young people in Angola. However, this education is deficient or even absent in various subsystems and, therefore, the impact of an educational intervention on human biology and sexuality was addressed. Materials and methods: This quasi-experimental study employed a non-equivalent control group, pre-test post-test design. It was conducted with students from three secondary schools (6th to 12th grade, two public and one private) in Huambo (Angola), between June and December 2017. First, a questionnaire was distributed to assess the students\u2019 knowledge on aspects related to sexual maturation, psychological development, gynecological organs\u2019 anatomy, human fertilization, contraception, and risks of unprotected sexuality. Then, an educational program was developed by the principal investigator along with the school\u2019s moral and civic education and biology teachers selected for a group of students (experimental group, EG); the others constituted the control group (CG). Classes were held on non-working days, on Saturday mornings (8:00 to 10:00 a.m.), so as not to interfere with the school calendar. The initial questionnaire was redistributed two months later to assess the impact of the intervention. Results: Of the 589 individuals included (mean age of 16.8 \u00b1 2.5 years), 56.7% were males. EG (n = 241) consisted of students from the public school and CG (n = 348) by students from public and private schools. The last part of the questionnaire consisted of 30 questions to assess students\u2019 knowledge, and in 23 of these questions, both groups showed no differences at baseline. After the intervention, the EG showed significant improvements (p &lt; 0.05), while the CG revealed only slight improvements. Conclusions: Students from Huambo province have a significant lack of knowledge on human biology and sexuality. Rigorous development and evaluation of interventions addressing multiple individual and environmental level factors is needed, notably for effective education in human biology and sexuality.<\/jats:p>","DOI":"10.3390\/ijerph16245155","type":"journal-article","created":{"date-parts":[[2019,12,20]],"date-time":"2019-12-20T03:19:36Z","timestamp":1576811976000},"page":"5155","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Effects of an Educational Intervention on Angolan Adolescents\u2019 Knowledge of Human Reproduction: A Quasi-Experimental Study"],"prefix":"10.3390","volume":"16","author":[{"given":"Nat\u00e9rcia","family":"Almeida","sequence":"first","affiliation":[{"name":"Department of Gynecology and Obstetrics, Central Hospital of Huambo, Huambo 95, Angola"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1199-2220","authenticated-orcid":false,"given":"Andreia","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Center for Health Technology and Services Research (CINTESIS), University of Porto, 4200-450 Porto, Portugal"},{"name":"Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal"},{"name":"ARC4DigiT, Instituto Polit\u00e9cnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal"}]},{"given":"Jos\u00e9","family":"Garcia","sequence":"additional","affiliation":[{"name":"Department of Histology and Medical Embryology, University Jos\u00e9 Eduardo dos Santos, Huambo 95, Angola"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5934-5201","authenticated-orcid":false,"given":"Nat\u00e1lia","family":"Martins","sequence":"additional","affiliation":[{"name":"Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal"},{"name":"Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal"}]},{"given":"Carla","family":"Ramalho","sequence":"additional","affiliation":[{"name":"Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal"},{"name":"Department of Obstetrics, Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal"},{"name":"Department of Gynecology and Obstetrics, Centro Hospitalar Universit\u00e1rio de S\u00e3o Jo\u00e3o, 4200\u2013319 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,17]]},"reference":[{"key":"ref_1","unstructured":"Garc\u00eda, A.I., \u00c1ngel, \u00c1.P., Herrera, L.F., and Morales, M.M.P. (2011). And What Do You Know about \u201cThat\u201d? Youth Sexual Education Handbook, Centro de Ediciones de la Diputaci\u00f3n de M\u00e1laga."},{"key":"ref_2","unstructured":"Reis, B., Lopes, D., Franco, P., and Vilela, R. (2015). Law, Religion, Right to Live and Abortion, Center of R&D about Law and Society."},{"key":"ref_3","unstructured":"Kollodge, R. (2013). Early Maternity: Facing the Challenge of Teenage Pregnancy. World Population Situation, Photographics, Inc.. [1st ed.]."},{"key":"ref_4","unstructured":"National Statistical Institute (INE) (2016). General Census of Population and Housing: Definitive Results."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1186\/s12889-017-4729-2","article-title":"Systematic review: A review of adolescent behavior change interventions [BCI] and their effectiveness in HIV and AIDS prevention in sub-Saharan Africa","volume":"17","author":"Mwale","year":"2017","journal-title":"BMC Public Health"},{"key":"ref_6","first-page":"196","article-title":"Limited effectiveness of HIV prevention for young people in sub-Saharan Africa: Studying the role of intervention and evaluation","volume":"5","author":"Michielsen","year":"2013","journal-title":"Facts Views Vis. ObGyn"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"186","DOI":"10.7196\/SAMJ.6097","article-title":"Prevalence of human immunodeficiency virus, hepatitis C virus, hepatitis B virus and syphilis among individuals attending anonymous testing for HIV in Luanda, Angola","volume":"103","author":"Lopes","year":"2013","journal-title":"S. Afr. Med. J."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"36","DOI":"10.1136\/sextrans-2018-053713","article-title":"Trichomonas vaginalis and HIV infection acquisition: A systematic review and meta-analysis","volume":"95","author":"Masha","year":"2019","journal-title":"Sex. Transm. Infect."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"371","DOI":"10.1093\/pubmed\/fdv046","article-title":"Use of services for prevention of mother-to-child transmission in Angola: A retrospective analysis","volume":"38","author":"Augusto","year":"2016","journal-title":"J. Public Health"},{"key":"ref_10","unstructured":"Education, M. (2015). Youth Sexual Education and Prevention of Unwanted Pregnancy, Mayamba Education. [1st ed.]."},{"key":"ref_11","unstructured":"(2016). Unicef OGE Education 2016, ADRA. [1st ed.]."},{"key":"ref_12","unstructured":"Republic of Angola (2015). 2015 National Exam of Education for All: Angola."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1186\/s12905-016-0326-2","article-title":"\u201cIt is challenging... oh, nobody likes it!\u201d: A qualitative study exploring Mozambican adolescents and young adults\u2019 experiences with contraception","volume":"16","author":"Capurchande","year":"2016","journal-title":"BMC Womens Health"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"294","DOI":"10.1016\/j.jpag.2013.12.008","article-title":"Parents\u2019 perceptions of timing of initiation of sexuality discussion with adolescents in anambra state, south eastern nigeria","volume":"27","author":"Emelumadu","year":"2014","journal-title":"J. Pediatr. Adolesc. Gynecol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1186\/s13104-018-3199-7","article-title":"Assessment of risky sexual behavior and practice among Aksum University students, Shire Campus, Shire Town, Tigray, Ethiopia, 2017","volume":"11","author":"Kebede","year":"2018","journal-title":"BMC Res. Notes"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"De Almeida, N., Teixeira, A., Capoco Sachiteque, A., Molina, J.R., dos Prazeres Tavares, H., and Ramalho, C. (2019). Characterisation of induced abortion and consequences to women\u2019s health at Hospital Central do Huambo -Angola. J. Obstet. Gynaecol.","DOI":"10.1080\/01443615.2019.1635096"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.11604\/pamj.2017.28.151.5370","article-title":"Potential predictors of risk sexual behavior among private college students in Mekelle City, North Ethiopia","volume":"28","author":"Gebresllasie","year":"2017","journal-title":"Pan Afr. Med. J."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"192","DOI":"10.1363\/3119205","article-title":"Gender and relationship differences in condom use among 15\u201324-year-olds in Angola","volume":"31","author":"Prata","year":"2005","journal-title":"Int. Fam. Plan. Perspect."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1","DOI":"10.4102\/phcfm.v10i1.1358","article-title":"Perceptions of young men at the Free State School of Nursing with regards to teenage pregnancy","volume":"10","author":"Madlala","year":"2018","journal-title":"Afr. J. Prim. Health Care Fam. Med."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"86","DOI":"10.1016\/j.srhc.2018.02.002","article-title":"Perceived responsibility for pregnancy and sexually transmitted infection prevention among young African American men: An exploratory focus group study","volume":"16","author":"Woodhams","year":"2018","journal-title":"Sex. Reprod. Healthc."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1016\/j.srhc.2018.03.002","article-title":"Motherhood increases support for family planning among Kenyan adolescents","volume":"16","author":"Velonjara","year":"2018","journal-title":"Sex. Reprod. Healthc."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"316","DOI":"10.9745\/GHSP-D-17-00471","article-title":"Engaging Men in Family Planning: Perspectives From Married Men in Lom\u00e9, Togo","volume":"6","author":"Koffi","year":"2018","journal-title":"Glob. Health Sci. Pract."},{"key":"ref_23","unstructured":"Cardoso, L.C. (2015). Birth Control. A View from Sub-Saharan Africa, Faculty of Theology, Department of Moral and Pastoral Theology."},{"key":"ref_24","first-page":"562","article-title":"The impact of education on sexual behavior in sub-Saharan Africa: A review of the evidence","volume":"24","author":"Zuilkowski","year":"2012","journal-title":"AIDS Care-Psychol. Socio-Med. Asp. AIDS\/HIV"},{"key":"ref_25","unstructured":"Tchivandja, Q. (2007). Causes of Material Deaths for Hypertensive Disease of Pregnancy in Angola 2001\u20132005 and in the Special Material of Children of Kiaban Kilaean Luanda, from January to December 2007. [Ph.D. Thesis, Universit\u00e0 degli Studi di Trieste]."},{"key":"ref_26","unstructured":"Dos Tavares, H.P. (2011). Obstetric, Socio-Demographic and Psychosocial Aspects of Adolescent Mothers Assisted at the Maternity of Central Hospital of Huambo, Province of Huambo-Angola\/Hamilton dos Prazeres Tavares. [Master\u2019s Thesis, University Est\u00e1cio de S\u00e1]."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"2831","DOI":"10.1007\/s10461-013-0541-x","article-title":"Synthesizing gender based HIV interventions in sub-sahara Africa: A systematic review of the evidence","volume":"17","author":"Small","year":"2013","journal-title":"AIDS Behav."}],"container-title":["International Journal of Environmental Research and Public Health"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1660-4601\/16\/24\/5155\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:42:59Z","timestamp":1760190179000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1660-4601\/16\/24\/5155"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,12,17]]},"references-count":27,"journal-issue":{"issue":"24","published-online":{"date-parts":[[2019,12]]}},"alternative-id":["ijerph16245155"],"URL":"https:\/\/doi.org\/10.3390\/ijerph16245155","relation":{},"ISSN":["1660-4601"],"issn-type":[{"value":"1660-4601","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,12,17]]}}}