Which of the following methods of contraception works to prevent the sperm from reaching an egg? ...

Which of the following methods of contraception works to prevent the sperm from reaching an egg?
 
  A) natural
  B) barrier
  C) hormonal
  D) surgical

---

Which of the following methods of contraception uses medications that prevent ovulation?
 
  A) natural
  B) barrier
  C) hormonal
  D) surgical

---

Which of the following methods of contraception is the most permanent?
 
  A) natural
  B) barrier
  C) hormonal
  D) surgical

---

Which of the following should be considered when choosing a contraception method?
 
  A) comfort
  B) side effects
  C) failure rate
  D) All of the answers are correct.

---

In which of the following processes, required for a pregnancy, does the blastocyst arrive from the fallopian tube and attach to the uterine lining?
 
  A) conception
  B) fertilization
  C) implantation
  D) ovulation