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  1. In the Hospital: How to Get the Best Care (video)
  2. In the Hospital: Three Tips for a Healthier Stay (video)
  3. In Vitro Fertilization (IVF)
  4. Incision Care After Surgery
  5. Incision of External Hemorrhoids
  6. Independent Living for People With Disabilities
  7. Indirect Coombs Test
  8. Indoor Tanning: Is It Safe?
  9. Induction Abortion
  10. Infant and Toddler Health
  11. Infant CPR (video)
  12. Infant Crying
  13. Infant Formulas
  14. Infant Massage
  15. Infantile Spasms (West Syndrome)
  16. Infertility
  17. Infertility: Emotional and Social Support
  18. Infertility: Ethical and Legal Concerns
  19. Infertility: Factors That Affect Treatment Success
  20. Infertility: Problems With Fallopian Tubes
  21. Infertility: Problems With Ovulation
  22. Infertility: Problems With the Man's Reproductive System
  23. Infertility: Problems With the Uterus and Cervix
  24. Infertility: Questions to Ask About Assisted Reproductive Technology
  25. Infertility: Questions to Ask About Medicine or Hormone Treatment
  26. Infertility: Setting Limits on Testing
  27. Infertility: Setting Limits on Treatment
  28. Infertility: Should I Have Treatment?
  29. Infertility Tests
  30. Infertility: Thinking About Adoption
  31. Infertility Treatment for Women With PCOS
  32. Inflammatory Bowel Disease and Cancer Risk
  33. Inflammatory Breast Cancer
  34. Influenza (Flu) Vaccine (Inactivated or Recombinant): What You Need to Know
  35. Influenza (Flu) Vaccine (Live, Intranasal): What You Need to Know
  36. Influenza (Seasonal Flu)
  37. Informal Caregivers in Cancer (PDQ®): Supportive care - Patient Information [NCI]
  38. Informal Caregivers in Cancer: Roles, Burden, and Support (PDQ®): Supportive care - Health Professional Information [NCI]
  39. Infrared Photocoagulation for Hemorrhoids
  40. Ingrown Toenail
  41. Inguinal Hernia
  42. Inguinal Hernia: Should I Have Surgery Now, or Should I Wait?
  43. Inguinal Hernia: Surgery in Adults
  44. Inhalant Use
  45. Inhaled Corticosteroids for Asthma
  46. Inhaled Quick-Relief Medicines for Asthma
  47. Injury to the Tailbone (Coccyx)
  48. Inpatient and Outpatient Treatment for Substance Use Disorder
  49. Insect Bites and Stings and Spider Bites
  50. Insect Bites and Stings: Here's Help (video)
  51. Insect Repellents
  52. Insect Stings: How to Remove the Stinger
  53. Insemination for Infertility
  54. Insemination Procedures
  55. Insomnia
  56. Insomnia: Improving Your Sleep
  57. Insomnia: Should I Take Sleeping Pills?
  58. Insulin: Giving an Injection in the Arm Using a Syringe (video)
  59. Insulin: How to Prepare a Mixed Dose (video)
  60. Insulin: How to Prepare a Single Dose (video)
  61. Insulin Resistance
  62. Insulin: Reusing Syringes and Lancets Safely
  63. Interactive Tool: Are You Depressed?
  64. Interactive Tool: Are You Ready to Quit Smoking?
  65. Interactive Tool: Do You Have a Drinking Problem?
  66. Interactive Tool: Do Your BMI and Waist Size Increase Your Health Risks?
  67. Interactive Tool: From Embryo to Baby in 9 Months
  68. Interactive Tool: How Bad Are Your Urinary Symptoms From Benign Prostatic Hyperplasia (BPH)?
  69. Interactive Tool: How Does Smoking Affect Your Lifespan?
  70. Interactive Tool: How Many Calories Did You Burn?
  71. Interactive Tool: How Much Is Smoking Costing You?
  72. Interactive Tool: How Well Do You Bounce Back?
  73. Interactive Tool: Should I Consider Surgery for My Low Back Problem?
  74. Interactive Tool: What Is Your Child's BMI?
  75. Interactive Tool: What Is Your Due Date?
  76. Interactive Tool: What Is Your Stress Level?
  77. Interactive Tool: What Is Your Target Heart Rate?
  78. Interactive Tool: When Are You Most Fertile?
  79. Interactive Tool: Which Health Screenings Do You Need?
  80. Interactive Tools
  81. Intermittent Catheterization for Men
  82. Intermittent Catheterization for Women
  83. Intermittent Claudication
  84. Intra-Aortic Balloon Pump
  85. Intracytoplasmic Sperm Injection (ICSI)
  86. Intradiscal Electrothermal Therapy (IDET) for Low Back Pain
  87. Intraocular Lens (IOL) Implants
  88. Intraocular (Uveal) Melanoma Treatment (PDQ®): Treatment - Health Professional Information [NCI]
  89. Intraocular (Uveal) Melanoma Treatment (PDQ®): Treatment - Patient Information [NCI]
  90. Intraoperative Cholangiogram
  91. Intrauterine Device (IUD) for Birth Control
  92. Intrauterine Fetal Blood Transfusion
  93. Intravenous Pyelogram (IVP) - Medical Test
  94. Intravenous Vitamin C (PDQ®): Integrative, alternative, and complementary therapies - Health Professional Information [NCI]
  95. Intravenous Vitamin C (PDQ®): Integrative, alternative, and complementary therapies - Patient Information [NCI]
  96. Introducing Foods to Your Baby
  97. Intussusception