Introduction.- Chapter 1: The Theory of Conjunctural Action.- Chapter 2: Consilience.- Chapter 3: Fertility Change and Variation: S. Philip Morgan and Hans-Peter Kohler.- Chapter 4: Social Class and the Timing and Context of Childbearing: Christine Bachrach, Pamela Smock, and Lynette Hoelter.- Chapter 5: A Conjunctural History of Assisted Reproductive Technologies: Jennifer Johnson-Hanks and Rosalind King.- Conclusion.