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

Regression Toward the Mean

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...

In Vitro Fertilization

In Vitro Fertilization

In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...

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 endometrial...

Fertilization

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

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...

Birth Control Methods

Birth Control Methods

Vasectomy is a surgical form of male sterilization that involves severing and sealing the vasa deferentia, preventing sperm from mixing with semen during ejaculation. Because a vasectomy does not impact the testes' ability to produce testosterone, hormone levels, libido, and sexual function generally remain unchanged. While vasectomy is highly effective in preventing pregnancy, with a success rate near 99.85%, rare cases of recanalization (spontaneous reconnection) can occur. Although vasectomy...

You might also read

Related Articles

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

Sort by

Same author

Circular Dichroism on the Edge of Quantum Hall Systems: From Many-Body Chern Number to Anisotropy Measurements.

Physical review letters·2026

Same author

Recent Developments in DFTB+, a Software Package for Efficient Atomistic Quantum Mechanical Simulations.

The journal of physical chemistry. A·2025

Same author

Thouless Pumping in a Driven-Dissipative Kerr Resonator Array.

Physical review letters·2025

Same author

Constitutive Model of Radiation Aging Effects in Filled Silicone Elastomers under Strain.

The journal of physical chemistry. B·2021

Same author

Non-Abelian Bloch oscillations in higher-order topological insulators.

Nature communications·2020

Same author

Development and internal validation of a diagnostic prediction model for COVID-19 at time of admission to hospital.

QJM : monthly journal of the Association of Physicians·2020

Search research articles

Related Experiment Video

Updated: May 27, 2026

Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model

Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model

Published on: April 7, 2023

Can fertility be estimated from current pregnancy data?

N Goldman, C F Westoff

Population Studies

|November 15, 2011

Summary

Estimating fertility using current pregnancy data in surveys is unreliable. This method underestimates fertility rates compared to using recent birth data, even for later pregnancy stages.

Area of Science:

Demography
Reproductive Health
Survey Methodology

Background:

Accurate fertility estimation is crucial for public health and policy.
Single-round surveys are common but their data quality for fertility metrics is debated.
World Fertility Survey data provides a large, international dataset for analysis.

Purpose of the Study:

To assess the feasibility of estimating fertility indicators from current pregnancy reports in single-round surveys.
To compare fertility estimates derived from current pregnancies versus recent births.
To evaluate the reliability of fertility measures obtained through this survey method.

Main Methods:

Utilized data from 15 countries participating in the World Fertility Survey.
Analyzed reports on current pregnancies within the survey data.

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

Fluorimetric Techniques for the Assessment of Sperm Membranes

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Related Experiment Videos

Last Updated: May 27, 2026

Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model

Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model

Published on: April 7, 2023

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

Fluorimetric Techniques for the Assessment of Sperm Membranes

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Compared fertility estimates (age pattern, total fertility ratio) derived from current pregnancies with those from recent births.

Main Results:

Neither the age-specific fertility pattern nor the total fertility ratio could be reliably estimated using current pregnancy data.
Total fertility ratio estimates based on recent births were consistently higher than those from current pregnancies across most countries.
This discrepancy persisted even when analyses focused on pregnancies of longer duration.

Conclusions:

Estimating fertility from current pregnancy data in single-round surveys is not a reliable method.
Current pregnancy data tends to underestimate overall fertility compared to recent birth data.
Methodological improvements or alternative data sources are needed for accurate fertility measurement.