2. Principles of Contraception

2.1 Goals of Contraception

  • Prevent fertilization
  • Prevent implantation
  • Prevent ovulation
  • Modify cervical mucus or uterine environment
  • Provide spacing or limitation of childbirth

2.2 Ideal Characteristics of a Contraceptive Method

  • Safe
  • Effective
  • Easily reversible
  • Long-lasting
  • Convenient
  • Affordable
  • Few side effects
  • Does not interfere with sexual activity