| Chapter 2: | Background and Theoretical Development |
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II. Factors affecting exposure to conception (conception variables).
- 7. Fecundity or infecundity, as affected by involuntary causes
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8. Use or non-use of contraception
- a.by mechanical and chemical means
- b.by other means
- 9. Fecundity or infecundity, as affected by voluntary causes (sterilization, subincision, medical treatment, etc.)
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III. Factors affecting gestation and successful parturition (gestation variables).
- 10. Foetal mortality from involuntary causes
- 11. Foetal mortality from voluntary causes. (p. 212)
Researchers have developed several theoretical developments since the introduction of the intermediate factors of