Offspring sex preference in frontier America

The Journal of Interdisciplinary History
|April 26, 2012
PubMed
Summary

Women born between 1850-1900 adjusted birth timing and spacing based on the sex of their children, showing a preference for sons. This behavior persisted across different fertility eras and religious groups.

Related Concept Videos

Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...
Mate Choice01:20

Mate Choice

Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
Sex-linked Disorders01:43

Sex-linked Disorders

Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
Monohybrid Crosses01:20

Monohybrid Crosses

Overview
Monohybrid Crosses01:20

Monohybrid Crosses

Overview