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Related Concept Videos

Infertility in Males01:23

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...
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...
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...
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...
Spermatogenesis01:41

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
Meiosis II01:57

Meiosis II

Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...

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Related Experiment Video

Updated: May 27, 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

Residency differentials in Mormon fertility.

B L Pitcher, E T Peterson, P R Kunz

    Population Studies
    |November 15, 2011
    PubMed
    Summary
    This summary is machine-generated.

    Mormon families relocating from Utah show lower fertility rates compared to those in homogeneous Mormon societies. Despite environmental pressures, these families maintain higher fertility than their non-Mormon neighbors.

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    Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives
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    Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives

    Published on: September 16, 2021

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    Last Updated: May 27, 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

    Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives
    08:46

    Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives

    Published on: September 16, 2021

    Area of Science:

    • Demography
    • Sociology
    • Religious Studies

    Background:

    • Recent fertility studies indicate converging religious differentials in fertility.
    • Limited research exists on Mormon fertility trends and differentials.
    • Mormon families have historically maintained higher fertility rates.

    Purpose of the Study:

    • To analyze the fertility trends and differentials among Mormon couples.
    • To examine the impact of geographical dispersion and varying social conditions on Mormon family size.
    • To understand how relocated Mormon families balance religious obligations with environmental influences.

    Main Methods:

    • Analysis of data from 1,001 Mormon couples.
    • Comparison of fertility rates between relocated Mormon families and those in homogeneous Mormon societies in Utah.
    • Comparison of fertility rates between relocated Mormon families and their non-Mormon neighbors.

    Main Results:

    • Relocated Mormon families exhibit lower fertility rates than their counterparts in Utah.
    • Fertility among relocated Mormon families is influenced by the social conditions of their new environments.
    • Despite lower fertility than in Utah, relocated Mormon families have larger families than their non-Mormon neighbors.

    Conclusions:

    • Geographical dispersion and assimilation into diverse social environments lead to reduced fertility among Mormon families.
    • Mormon families demonstrate a strong commitment to their religious beliefs regarding procreation, even when facing environmental challenges.
    • The study highlights the interplay between religious adherence, social adaptation, and fertility behavior in a specific religious group.