Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Conservation of Declining Populations

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

Applications of Life Tables

Applications of Life Tables

Life tables are versatile across various fields, providing a quantitative basis for analyzing mortality and survival rates. Whether used by demographers, actuaries, epidemiologists, or sociologists, life tables offer valuable insights into the dynamics of life and death, facilitating informed decisions in public health, insurance, conservation, and beyond. Their broad applicability highlights the interconnectedness of demographic data with practical outcomes in everyday life and strategic...

Infertility in Females

Infertility in Females

Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of...

Infertility in Males

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...

Nondisjunction

Nondisjunction

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...

Menopause

Menopause

Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

IPUMS Full Count Datasets of Enslaved Persons and Slaveholders in the United States in 1850 and 1860.

Historical methods·2026

Same author

The decline of child stunting in 122 countries: a systematic review of child growth studies since the 19th century.

BMJ global health·2026

Same author

A bypass gateway from cholesterol to sex steroid biosynthesis circumnavigates CYP17A1.

Nature communications·2025

Same author

New Data Sources for Research on the Nineteenth-Century United States: IPUMS Full Count Datasets of the Censuses of Population 1850-1880.

Historical methods·2025

Same author

The IPUMS Multigenerational Longitudinal Panel: Progress and Prospects.

Historical methods·2025

Same author

Did migration alter the path of the demographic transition for French Canadians in the United States?

The history of the family : an international quarterly·2025

Search research articles

Related Experiment Video

Updated: Sep 5, 2025

Accurate Follicle Enumeration in Adult Mouse Ovaries

Accurate Follicle Enumeration in Adult Mouse Ovaries

Published on: October 16, 2020

Fertility decline in the United States, 1850-1930: New Evidence from Complete-Count Datasets.

J David Hacker¹, Evan Roberts¹

¹Minnesota Population Center, University of Minnesota.

Annales De Demographie Historique

|July 7, 2022

Summary

US fertility rates declined significantly between 1835 and 1935. Economic and urbanization shifts were key drivers, alongside cultural and religious factors influencing family size decisions.

More Related Videos

Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation

Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation

Published on: October 25, 2024

Author Spotlight: Evaluating the Impact of Immediate Partial Removal of Cumulus-Oocyte Complexes on Fertilization Efficiency and Embryo Quality

Author Spotlight: Evaluating the Impact of Immediate Partial Removal of Cumulus-Oocyte Complexes on Fertilization Efficiency and Embryo Quality

Published on: October 18, 2024

Related Experiment Videos

Last Updated: Sep 5, 2025

Accurate Follicle Enumeration in Adult Mouse Ovaries

Accurate Follicle Enumeration in Adult Mouse Ovaries

Published on: October 16, 2020

Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation

Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation

Published on: October 25, 2024

Author Spotlight: Evaluating the Impact of Immediate Partial Removal of Cumulus-Oocyte Complexes on Fertilization Efficiency and Embryo Quality

Author Spotlight: Evaluating the Impact of Immediate Partial Removal of Cumulus-Oocyte Complexes on Fertilization Efficiency and Embryo Quality

Published on: October 18, 2024

Area of Science:

Demography
Economic History
Sociology

Background:

Total fertility in the United States dramatically decreased from 7.0 to 2.1 between 1835 and 1935.
Studying this fertility decline historically has been limited by data availability.

Purpose of the Study:

To analyze the detailed factors contributing to the fertility decline in the U.S. from 1835 to 1935.
To model couples' fertility decisions by incorporating economic, social, cultural, and familial variables.

Main Methods:

Utilized new IPUMS complete-count microdata from the 1850, 1880, 1910, and 1930 U.S. censuses.
Constructed comprehensive fertility models for couples.
Included measures of parental religiosity and kin availability.

Main Results:

Shifts in occupational structure and increasing urbanization were consistent, substantive contributors to fertility decline.
Cultural and religious attitudes, indicated by parental nativities and child naming practices, significantly influenced childbearing decisions.

Conclusions:

The U.S. fertility decline was a complex phenomenon driven by both structural economic changes and deeply ingrained cultural/religious beliefs.
New census microdata enables more granular analysis of historical demographic shifts.