University of Michigan: Completing the Set - 'Coupon-Collection Behavior' Reduces Sex-Ratio Variation Among Families
August 07, 2020
August 07, 2020
ANN ARBOR, Michigan, Aug. 7 -- The University of Michigan issued the following news release:
A new analysis of sibling records from more than 300,000 individuals suggests that some parents continue to reproduce until they have children of both sexes.
The practice, which the two University of Michigan biologists who conducted the study dubbed "coupon-collection behavior" in human reproduction, appears to have increased in popularity in recent decades and reduce . . .
A new analysis of sibling records from more than 300,000 individuals suggests that some parents continue to reproduce until they have children of both sexes.
The practice, which the two University of Michigan biologists who conducted the study dubbed "coupon-collection behavior" in human reproduction, appears to have increased in popularity in recent decades and reduce . . .