Related Experiment Video

Updated: Aug 10, 2026

Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model
06:49

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

Published on: April 7, 2023

What is natural fertility? The remodeling of a concept

Y Xie

    Population Index
    |January 1, 1990
    PubMed

    Keywords:
    Demographic FactorsFertilityMethodological StudiesModels, TheoreticalNatural FertilityPopulationPopulation DynamicsResearch MethodologyWorld

    More Related Videos

    Z-Scores for Assessing Ovarian Reserve in Young Patients Undergoing Fertility Preservation05:42

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

    Published on: October 25, 2024

    Collection of Human Follicular Fluid, Follicle Somatic Cells, and Immature Oocytes from Individuals Undergoing In Vitro Fertilization06:40

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

    Published on: October 24, 2025

    Related Concept Videos

    Fertilization01:38

    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...
    Introduction to Nuclear Reprogramming01:14

    Introduction to Nuclear Reprogramming

    Nuclear reprogramming is the process of switching gene expression of one cell type to that of another cell type, usually from a differentiated cell state to an undifferentiated cell state. Differentiation occurs during processes such as development and morphogenesis, tissue regeneration, and malignancy. Cells can also be artificially induced to reprogram their gene expression by techniques such as nuclear transfer, induced pluripotency, and cell fusion. Such techniques have many applications in...
    Methods of Nuclear Reprogramming01:24

    Methods of Nuclear Reprogramming

    Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for injury repair.
    In Vitro Fertilization01:24

    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 Females01:28

    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...
    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...