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