References
- United NationsDepartment of Economic and Social Affair, Population Division. World Contraceptive Use 2011 Available from: 111.un.org/esa/population/publications/contraceptive/2011/contraceptive2011.htm
- FinerLBZolnaMRDeclines in unintended pregnancy in the United States, 2008–2011N Engl J Med2016374984385226962904
- HarperCCRoccaCHThompsonKMReductions in pregnancy rates in the USA with long-acting reversible contraception: a cluster randomised trialLancet2015386999356256826091743
- MumfordSDKesselEWas the Dalkon Shield a safe and effective intrauterine device? The conflict between case-control and clinical trial study findingsFertil Steril1992576115111761601137
- SivinIAnother look at the Dalkon Shield: meta-analysis underscores its problemsContraception19934811128403900
- DalingJRWeissNSMetchBJPrimary tubal infertility in relation to the use of an intrauterine deviceN Engl J Med1985312159379413974683
- DiedrichJTMaddenTZhaoQPeipertJFLong-term utilization and continuation of intrauterine devicesAm J Obstet Gynecol20152136822.e1e626409157
- BirgissonNEZhaoQSecuraGMMaddenTPeipertJFPreventing unintended pregnancy: the contraceptive CHOICE project in reviewJ Womens Health (Larchmt)201524534935325825986
- RickettsSKlinglerGSchwalbergRGame change in Colorado: widespread use of long-acting reversible contraceptives and rapid decline in births among young, low-income womenPerspect Sex Reprod Health201446312513224961366
- CDC [webpage on the Internet]CDC United States Medical Eligibility Criteria (US MEC) for Contraceptive Use2010 Available from: http://www.cdc.gov/reproductivehealth/unintendedpregnancy/usmec.htmAccessed July 12, 2016
- World Health Organization (WHO) [webpage on the Internet]Medical Eligibility Criteria for Contraceptive UseFifth ed2015 Available from: http://apps.who.int/iris/bitstream/10665/172915/1/WHO_RHR_15.07_eng.pdfAccessed July 12, 2016
- CDC United States Selected Practice Recommendations (US SPR) for Contraceptive Use. 20162016654165 Available from: 111.cdc.gov/reproductivehealth/contraception/usspr.htm
- World Health Organization (WHO) [webpage on the Internet]Selected Practice Recommendations for Contraceptive Use2014 Available from: http://apps.who.int/iris/bitstream/10665/43097/1/9241562846.pdfAccessed July 12, 2016
- AAP [webpage on the Internet]American Academy of Pediatrics (AAP) Contraception for Adolescents Available from: http://pediatrics.aappublications.org/content/134/4/e1257Accessed July 12, 2016
- Committee on Adolescent Health Care Long-Acting Reversible Contraception Working Group, The American College of Obstetricians and GynecologistsCommittee opinion no. 539: adolescents and long-acting reversible contraception: implants and intrauterine devicesObstet Gynecol2012120498398822996129
- LawAWenLLinJTangiralaMSchwartzJSZampaglioneEAre women benefiting from the Affordable Care Act? A real-world evaluation of the impact of the Affordable Care Act on out-of-pocket costs for contraceptivesContraception201693539239726806631
- BednarekPHCreininMDReevesMFPost-Aspiration IUD Randomization (PAIR) Study Trial GroupImmediate versus delayed IUD insertion after uterine aspirationN Engl J Med2011364232208221721651392
- RoseSBLawtonBAImpact of long-acting reversible contraception on return for repeat abortionAm J Obstet Gynecol2012206137.e1e621944222
- LopezLMBernholcAHubacherDStuartGVan VlietHAImmediate postpartum insertion of intrauterine device for contraceptionCochrane Database Syst Rev20156CD003036
- CohenRSheederJArangoNTealSBTocceKTwelve-month contraceptive continuation and repeat pregnancy among young mothers choosing postdelivery contraceptive implants or postplacental intrauterine devicesContraception201693217818326475368
- ChenBAReevesMFCreininMDSchwarzEBPostplacental or delayed levonorgestrel intrauterine device insertion and breast-feeding durationContraception201184549950422018124
- RoyerPATurokDKSandersJNSaltzmanHMChoice of emergency contraceptive making regarding and decision subsequent unintended pregnancyJ Womens Health (Larchmt)2016 Epub2016331
- Abu HashimHGhayatyEEl RakhawyMLevonorgestrel-releasing intrauterine system vs oral progestins for non-atypical endometrial hyperplasia: a systematic review and metaanalysis of randomized trialsAm J Obstet Gynecol2015213446947825797236
- CholakianDHackerKFaderANGehrigPATannerEJ3rdEffect of oral versus intrauterine progestins on weight in women undergoing fertility preserving therapy for complex atypical hyperplasia or endometrial cancerGynecol Oncol2016140223423826706662
- DepypereHInkiPThe levonorgestrel-releasing intrauterine system for endometrial protection during estrogen replacement therapy: a clinical reviewClimacteric201518447048225553775
- KavanaughMLJermanJFinerLBChanges in use of long-acting reversible contraceptive methods among U.S. women, 2009–2012Obstet Gynecol2015126591792726444110
- PapicMWangNParisiSMBaldaufEUpdikeGSchwarzEBSame-day intrauterine device placement is rarely complicated by pelvic infectionWomens Health Issues2015251222725445666
- ReevesMFZhaoQSecuraGMPeipertJFRisk of unintended pregnancy based on intended compared to actual contraceptive useAm J Obstet Gynecol2016215171.e1e626805610
- DotyNMacIsaacLEffect of an atraumatic vulsellum versus a single-tooth tenaculum on pain perception during intrauterine device insertion: a randomized controlled trialContraception201592656757126007292
- LopezLMBernholcAZengYInterventions for pain with intrauterine device insertionCochrane Database Syst Rev20157CD007373
- NgoLLWardKKModySKKetorolac for pain control with intrauterine device placement: a randomized controlled trialObstet Gynecol20151261293626241253
- HubacherDReyesVLilloSZepedaAChenPLCroxattoHPain from copper intrauterine device insertion: randomized trial of prophylactic ibuprofenAm J Obstet Gynecol200619551272127717074548
- BednarekPHCreininMDReevesMFCwiakCEspeyEJensenJTPost-aspiration IUD randomization (PAIR) study trial group. Prophylactic ibuprofen does not improve pain with IUD insertion: a randomized trialContraception201591319319725487172
- MasseySEVaradyJCHenzlMRPain relief with naproxen following insertion of an intrauterine deviceJ Reprod Med19741362262314612152
- KarabayirliSAyrimAAMusluBComparison of the analgesic effects of oral tramadol and naproxen sodium on pain relief during IUD insertionJ Minim Invasive Gynecol201219558158422766124
- McNicholasCPMaddenTZhaoQSecuraGAllsworthJEPeipertJFCervical lidocaine for IUD insertional pain: a randomized controlled trialAm J Obstet Gynecol20122075384.e1e623107081
- AllenRHRakerCGoyalVHigher dose cervical 2% lidocaine gel for IUD insertion: a randomized controlled trialContraception201388673073624012096
- AksoyHAksoyÜOzyurtSAçmazGBabayigitMLidocaine 10% spray to the cervix reduces pain during intrauterine device insertion: a double-blind randomised controlled trialJ Fam Plann Reprod Health Care2016422838725759418
- NelsonALFongJKIntrauterine infusion of lidocaine does not reduce pain scores during IUD insertionContraception2013881374023375352
- Tornblom-PaulanderSTingåkerBKWernerANovel topical formulation of lidocaine provides significant pain relief for intrauterine device insertion: pharmacokinetic evaluation and randomized placebo-controlled trialFertil Steril2015103242242725455873
- TavakolianSDoulabiMABaghbanAAMortazaviAGhorbaniMLidocaine-prilocaine cream as analgesia for IUD insertion: a prospective, randomized, controlled, triplebBlinded studyGlob J Health Sci20157439940425946948
- DijkhuizenKDekkersOMHolleboomCAVaginal misoprostol prior to insertion of an intrauterine device: an RCTHum Reprod201126232332921159683
- KredietCTvan DijkNLinzerMvan LieshoutJJWielingWManagement of vasovagal syncope: controlling or aborting faints by leg crossing and muscle tensingCirculation2002106131684168912270863
- GroothuisJTvan DijkNTer WoerdsWWielingWHopmanMTLeg crossing with muscle tensing, a physical counter-maneuver to prevent syncope, enhances leg blood flowClin Sci (Lond)2007112319320116987103
- Ortho Pharmaceutical Corporation [webpage on the Internet]Para-Gard Prescribing InformationRaritan, NJOrtho Pharmaceutical Corporation1995 Available from: http://www.accessdata.fda.gov/drugsatfda_docs/label/2005/018680s060lbl.pdfAccessed July 12, 2016
- SivinIUtility and drawbacks of continuous use of a CuT 380A IUD for 20 yearsContraception2007756 supplS70S7517531620
- WuJPPickleSExtended use of the intrauterine device: a literature review and recommendations for clinical practiceContraception201489649550324679478
- HeinemannKReedSMoehnerSMinhTDRisk of uterine perforation with levonorgestrel-releasing and copper intrauterine devices in the European Active Surveillance Study on Intrauterine DevicesContraception201591427427925601352
- SegalSJAlvarez-SanchezFAdejuwonCABrache de MejiaVLeonPFaundesAAbsence of chorionic gonadotropin in sera of women who use intrauterine devicesFertil Steril19854422142184018277
- KhoKAChamsyDJPerforated intraperitoneal intrauterine contraceptive devices: diagnosis, management, and clinical outcomesJ Minim Invasive Gynecol201421459660124462588
- StanfordJBMikolajczykRTMechanisms of action of intrauterine devices: update and estimation of post-fertilization effectsAm J Obstet Gynecol200218761699170812501086
- OrtizMECroxattoHBThe mode of action of IUDsContraception198736137533311625
- AlvarezFBracheVFernandezENew insights on the mode of action of intrauterine contraceptive devices in womenFertil Steril19884957687733360166
- El-HabashiMEl-SahwiSGawishSOsmanMEffect of Lippes loop on sperm recovery from human fallopian tubesContraception19802255495557471742
- KesserüECamacho-OrtegaPInfluence of metals on in vitro sperm migration in the human cervical mucusContraception1972632312404650670
- RiveraRYacobsonIGrimesDThe mechanism of action of hormonal contraceptives and intrauterine contraceptive devicesAm J Obstet Gynecol19991815 pt 11263126910561657
- RowePFarleyTPeregoudovAIUD Research Group of the UNDP/UNFPA/WHO/World Bank Special Programme of ResearchDevelopment and Research Training in Human ReproductionSafety and efficacy in parous women of a 52-mg levonorgestrel-medicated intrauterine device: a 7-year randomized comparative study with the TCu380AContraception201693649850626916172
- United Nations DevLong-term reversible contraception. Twelve years of experience with the TCu380A and TCu220CContraception19975663413529494767
- ThonneauPFAlmontTContraceptive efficacy of intrauterine devicesAm J Obstet Gynecol2008198324825318221924
- HeinemannKReedSMoehnerSMinhTDComparative contraceptive effectiveness of levonorgestrel-releasing and copper intrauterine devices: the European Active Surveillance Study for Intrauterine DevicesContraception201591428028325601350
- KaneshiroBAebyTLong-term safety, efficacy, and patient acceptability of the intrauterine Copper T-380A contraceptive deviceInt J Womens Health2010221122021072313
- Economic and Social Affairs [webpage on the Internet]Trends in Contraceptive Use Worldwide2015 Available from: http://www.un.org/en/development/desa/population/publications/pdf/family/trendsContraceptiveUse2015Report.pdfAccessed July 12, 2016
- KakaireOByamugishaJKTumwesigyeNMGemzell-DanielssonKIntrauterine contraception among women living with human immunodeficiency virus: a randomized controlled trialObstet Gynecol2015126592893426444127
- MilsomIAnderssonKJonassonKLindstedtGRyboGThe influence of the Gyne-T 380S IUD on menstrual blood loss and iron statusContraception19955231751797587189
- ZiemanMKanalECopper T 380A IUD and magnetic resonance imagingContraception2007752939517241836
- HubacherDChenPLParkSSide effects from the copper IUD: do they decrease over time?Contraception200979535636219341847
- GrimesDAHubacherDLopezLMSchulzKFNon-steroidal anti-inflammatory drugs for heavy bleeding or pain associated with intrauterine-device useCochrane Database Syst Rev20064CD00603417054271
- GodfreyEMFolgerSGJengGJamiesonDJCurtisKMTreatment of bleeding irregularities in women with copper-containing IUDs: a systematic reviewContraception201387554956623199413
- Effects of contraceptives on hemoglobin and ferritinTask Force for Epidemiological Research on Reproductive Health, United Nations Development Programme/United Nations Population Fund/World Health Organization/World Bank Special Programme of Research, Development and Research Training in Human Reproduction, World Health Organization, Geneva, SwitzerlandContraception19985852622739883381
- KaislasuoJHeikinheimoOLähteenmäkiPSuhonenSMenstrual characteristics and ultrasonographic uterine cavity measurements predict bleeding and pain in nulligravid women using intrauterine contraceptionHum Reprod20153071580158825990577
- BilianXChinese experience with intrauterine devicesContraception2007756 supplS31S3417531613
- FasoliMParazziniFCecchettiGLa VecchiaCPost-coital contraception: an overview of published studiesContraception19893944594682656085
- WuSGodfreyEMWojdylaDT380A intrauterine device for emergency contraception: a prospective, multicentre, cohort clinical trialBJOG2010117101205121020618314
- ChengLCheYGülmezogluAMInterventions for emergency contraceptionCochrane Database Syst Rev20128CD001324
- TrussellJHassanFLowinJLawAFilonenkoAAchieving cost-neutrality with long-acting reversible contraceptive methodsContraception2015911495625282161
- ChenYLuoYJiaZJiaDChenJPreparation and characterization of silicone rubber/nano-copper nanocomposites for use in intrauterine devicesBiomed Mater Eng20142411269127424212022
- LiJSuoJHuangXYeCWuXRelease behavior of copper ion in a novel contraceptive compositeContraception200776323323717707722
- RamakrishnanRBBApremASControlled release of copper from an intrauterine device using a biodegradable polymerContraception201592658558826363430
- JinyingLYingLXuanGYanliGJianpingLInvestigation of the release behavior of cupric ion for three types of Cu-IUDs and indomethacin for medicated u-IUD in simulated uterine fluidContraception200877429930218342655
- XuXXNieFLWangYBEffective inhibition of the early copper ion burst release with ultra-fine grained copper and single crystal copper for intrauterine device applicationActa Biomater20128288689622040688
- WildemeerschDGoldstuckNDHasskampTIntrauterine systems: a frameless future?Expert Opin Drug Deliv201613691191826948462
- WildemeerschDPettAJandiSNolteKNew visualized anchor for framless IUD is helpful for checking correct insertionJ Fam Plann Reprod Health Care201440431031125240036
- BaramIWeinsteinATrussellJThe IUB, a newly invented IUD: a brief reportContraception201489213914124309220
- ApterDGemzell-DanielssonKHauckBRosenKZurthCPharmacokinetics of two low-dose levonorgestrel-releasing intrauterine systems and effects on ovulation rate and cervical function: pooled analyses of phase II and III studiesFertil Steril2014101616561662.e1e424726226
- CristobalILeteLIViuda EdeLPeruleroNArbatACanalsIOne year quality of life measured with SEC-QoL in levonorgestrel 52mg IUS usersContraception201693436737126764120
- LewisRATaylorDNatavioMFMelamedAFelixJMishellDJrEffects of the levonorgestrel-releasing intrauterine system on cervical mucus quality and sperm penetrabilityContraception201082649149621074010
- NatavioMFTaylorDLewisRATemporal changes in cervical mucus after insertion of the levonorgestrel-releasing intrauterine systemContraception201387442643123121828
- AnderssonKOdlindVRyboGLevonorgestrel-releasing and copper-releasing (Nova T) IUDs during five years of use: a randomized comparative trialContraception199449156728137626
- FraserISNon-contraceptive health benefits of intrauterine hormonal systemsContraception201082539640320933112
- BednarekPHJensenJTSafety, efficacy and patient acceptability of the contraceptive and non-contraceptive uses of the LNG-IUSInt J Womens Health20101455821072274
- QiuJChengJWangQHuaJLevonorgestrel-releasing intrauterine system versus medical therapy for menorrhagia: a systematic review and meta-analysisMed Sci Monit2014201700171325245843
- KiseliMKayikciogluFEvliyaogluOHaberalAComparison of therapeutic efficacies of norethisterone, tranexamic acid and levonorgestrel-releasing intrauterine system for the treatment of heavy menstrual bleeding: a randomized controlled studyGynecol Obstet Invest2016 Epub20163827832646
- KaunitzAMBissonnetteFMonteiroILukkari-LaxEMuysersCJensenJTLevonorgestrel-releasing intrauterine system or medroxy-progesterone for heavy menstrual bleeding: a randomized controlled trialObstet Gynecol2010116362563220733445
- KaunitzAMInkiPThe levonorgestrel-releasing intrauterine system in heavy menstrual bleeding: a benefit-risk reviewDrugs201272219321522268392
- GanzMLShahDGidwaniRThe cost-effectiveness of the levonorgestrel-releasing intrauterine system for the treatment of idiopathic heavy menstrual bleeding in the United StatesValue Health201316232533323538185
- ParkDSKimMLSongTClinical experiences of the levonorgestrel-releasing intrauterine system in patients with large symptomatic adenomyosisTaiwan J Obstet Gynecol201554441241526384061
- MarjoribanksJLethabyAFarquharCSurgery versus medical therapy for heavy menstrual bleedingCochrane Database Syst Rev20161CD003855
- YangBQXuJHTengYCLevonorgestrel intrauterine system versus thermal balloon ablation for the treatment of heavy menstrual bleeding: a meta-analysis of randomized controlled trialsExp Ther Med20151051665167426640534
- GuptaJKDanielsJPMiddletonLJECLIPSE Collaborative GroupA randomized controlled trial of the clinical effectiveness and cost-effectiveness of the levonorgestrel-releasing intrauterine system in primary care against standard treatment for menorrhagia: the ECLIPSE trialHealth Technol Assess20151988ixxv1118
- KaunitzAMBissonnetteFMonteiroILukkari-LaxEDeSanctisYJensenJLevonorgestrel-releasing intrauterine system for heavy menstrual bleeding improves hemoglobin and ferritin levelsContraception201286545245722959906
- JiFYangXHAi Xing ZiALHa Ni Ke ZiTXHeYDingYRole of levonorgestrel-releasing intrauterine system in dysmenorrhea due to adenomyosis and the influence on ovarian functionClin Exp Obstet Gynecol201441667768025566593
- ImaiAMatsunamiKTakagiHIchigoSLevonorgestrel-releasing intrauterine device used for dysmenorrhea: five-year literature reviewClin Exp Obstet Gynecol201441549549825864246
- BahamondesLPettaCAFernandesAMonteiroIUse of the levonorgestrel-releasing intrauterine system in women with endometriosis, chronic pelvic pain and dysmenorrheaContraception2007756 supplS134S13917531605
- ShengJZhangWYZhangJPLuDThe LNG-IUS study on adenomyosis: a 3-year follow-up study on the efficacy and side effects of the use of levonorgestrel intrauterine system for the treatment of dysmenorrhea associated with adenomyosisContraception200979318919319185671
- LanSLingLJianhongZXijingJLihuiWAnalysis of the levonorgestrel-releasing intrauterine system in women with endometriosisJ Int Med Res201341354855823660087
- PettaCAFerrianiRAAbraoMSRandomized clinical trial of a levonorgestrel-releasing intrauterine system and a depot GnRH analogue for the treatment of chronic pelvic pain in women with endometriosisHum Reprod20052071993199815790607
- Abou-SettaAMHoustonBAl-InanyHGFarquharCLevonorgestrel-releasing intrauterine device (LNG-IUD) for symptomatic endometriosis following surgeryCochrane Database Syst Rev20131CD005072
- WanYLHollandCThe efficacy of levonorgestrel intrauterine systems for endometrial protection: a systematic reviewClimacteric201114662263222017273
- SomboonpornWPannaSTemtanakitpaisanTKaewrudeeSSoontrapaSEffects of the levonorgestrel-releasing intrauterine system plus estrogen therapy in perimenopausal and postmenopausal women: systematic review and meta-analysisMenopause201118101060106621720280
- DominickSHickeyMChinJSuHILevonorgestrel intrauterine system for endometrial protection in women with breast cancer on adjuvant tamoxifenCochrane Database Syst Rev201512CD007245
- KimMKSeongSJKimJWManagement of endometrial hyperplasia with a levonorgestrel-releasing intrauterine system: a Korean gynecologic-oncology group studyInt J Gynecol Cancer201626471171526905333
- LuoLLuoBZhengYZhangHLiJSidellNLevonorgestrel-releasing intrauterine system for atypical endometrial hyperplasiaCochrane Database Syst Rev20136CD009458
- El BeheryMMSalehHSIbrahiemMAKamalEMKassemGAMohamed MelSLevonorgestrel-releasing intrauterine device versus dydrogesterone for management of endometrial hyperplasia without atypiaReprod Sci201522332933425001020
- KimMKSeongSJKimYSCombined medroxyprogesterone acetate/levonorgestrel-intrauterine system treatment in young women with early-stage endometrial cancerAm J Obstet Gynecol20132094358.e1e423791687
- MorelliMDi CelloAVenturellaRMocciaroRD’AlessandroPZulloFEfficacy of the levonorgestrel intrauterine system (LNG-IUS) in the prevention of the atypical endometrial hyperplasia and endometrial cancer: retrospective data from selected obese menopausal symptomatic womenGynecol Endocrinol201329215615923134558
- ØrboAArnesMVereideABStraumeBRelapse risk of endometrial hyperplasia after treatment with the levonorgestrel-impregnated intrauterine system or oral progestogensBJOG2015 Epub2015122
- TurokDKSandersJNThompsonISRoyerPAEggebrotenJGawronLMPreference for and efficacy of oral levonorgestrel for emergency contraception with concomitant placement of a levonorgestrel IUD: a prospective cohort studyContraception201693652653226944863
- EisenbergDLSchreiberCATurokDKACCESS IUS InvestigatorsThree-year efficacy and safety of a new 52-mg levonorgestrel-releasing intrauterine systemContraception2015921101625934164
- CreininMDJansenRStarrRMLevonorgestrel release rates over 5 years with the Liletta® 52-mg intrauterine systemContraception Epub2016
- BahamondesMVMonteiroICastroSEspejo-ArceXBahamondesLProspective study of the forearm bone mineral density of long-term users of the levonorgestrel-releasing intrauterine systemHum Reprod20102551158116420185512
- MawetMNollevauxFNizetDImpact of a new levonorgestrel intrauterine system, Levosert, on heavy menstrual bleeding: results of a one-year randomized controlled trialEur J Contracept Reprod Health Care201419316917924666176
- NelsonAApterDHauckBTwo low-dose levonorgestrel intrauterine contraceptive systems: a randomized controlled trialObstet Gynecol201312261205121324240244
- ApterDGemzell-DanielssonKHauckBRosenKZurthCPharmacokinetics of two low-dose levonorgestrel-releasing intrauterine systems and effects on ovulation rate and cervical function: pooled analyses of phase II and III studiesFertil Steril2014101616566224726226
- Gemzell-DanielssonKBuhlingKJDermoutSMLukkari-LaxEMontegriffoEApterDA phase III, single-arm study of LNG-IUS 8, a low-dose levonorgestrel intrauterine contraceptive system (total content 13.5mg) in postmenarcheal adolescentsContraception201693650751226872720
- Gemzell-DanielssonKSchellschmidtIApterDA randomized, phase II study describing the efficacy, bleeding profile, and safety of two low-dose levonorgestrel-releasing intrauterine contraceptive systems and MirenaFertil Steril201297361662222222193
- Al-AshwalRHAzizNANoohSMDevelopment of a smart IUD launcher for prevention of uterine perforationBiomed Tech (Berl)2016 Epub2016225
- PotterJRubinSEShermanPFear of intrauterine contraception among adolescents in New York CityContraception201489544645024560479
- MoosMKDunlopALJackBWHealthier women, healthier reproductive outcomes: recommendations for the routine care of all women of reproductive ageAm J Obstet Gynecol20081996 suppl 2S280S28919081422
- FosterDGBiggsMARalphLJAronsABrindisCDFamily planning and life planning reproductive intentions among individuals seeking reproductive health careWomens Health Issues200818535135918485738
- NelsonALShabaikSXandrePAwaidaJYReproductive life planning and preconception care 2015: attitudes of English-speaking family planning patientsJ Womens Health (Larchmt)2016 Epub2016314
- BorreroSNikolajskiCSteinbergJR“It just happens”: a qualitative study exploring low-income women’s perspectives on pregnancy intention and planningContraception201591215015625477272
- The National Campaign to Prevent Teen and Unplanned Pregnancy [homepage on the Internet] Available from: https://thenationalcampaign.org/Accessed June 28, 2016