Related Experiment Video

Updated: Oct 20, 2026

Collection of Human Follicular Fluid, Follicle Somatic Cells, and Immature Oocytes from Individuals Undergoing In Vitro Fertilization
06:40

Collection of Human Follicular Fluid, Follicle Somatic Cells, and Immature Oocytes from Individuals Undergoing In Vitro Fertilization

Published on: October 24, 2025

Changes in fertility and family sizes in Europe

D Pearce, G Cantisani, A Laihonen

    Population Trends
    |June 16, 1999
    PubMed

    Keywords:
    Birth RateDemographic FactorsDeveloped CountriesEuropeFamily And HouseholdFamily CharacteristicsFamily Size--changesFertilityFertility DeclineFertility MeasurementsFertility Rate--changesPopulationPopulation Dynamics

    More Related Videos

    Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives08:46

    Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives

    Published on: September 16, 2021

    Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria07:25

    Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

    Published on: July 20, 2017

    Related Concept Videos

    Population Growth00:57

    Population Growth

    Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.However, realistic environmental conditions limit the number of...
    Life Histories01:29

    Life Histories

    Constrained by limited energy and resources, organisms must compromise between offspring quantity and parental investment. This trade-off is represented by two primary reproductive strategies; K-strategists produce few offspring but provide substantial parental support, whereas r-strategists produce much progeny that receives little care. These strategies are related to an organism’s survival likelihood across its lifespan, which is represented by a survivorship curve. Three general types of...
    Energy Budgets and Reproductive Strategies00:51

    Energy Budgets and Reproductive Strategies

    Organisms must balance energy intake with the energy required for growth, maintenance, and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species reproduce only once in their lifetime, often investing most available resources into that single reproductive event. Iteroparous species, by contrast, reproduce multiple times over their lifetimes, typically allocating fewer resources to any single...
    Mutation, Gene Flow, and Genetic Drift01:09

    Mutation, Gene Flow, and Genetic Drift

    In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...
    Gene Flow03:27

    Gene Flow

    Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
    Conservation of Declining Populations02:07

    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.