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Related Concept Videos

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...
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...
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...
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...
Ovarian Cycle01:27

Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...
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: Jul 9, 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

Pregnancy following infertility: a concern?

R Chibber1, M H Al-Sibai

  • 1Department of Obstetrics and Gynecology, College of Medicine, King Faisal University, Dammam, Kingdom of Saudi Arabia. rachana_chibber@yahoo.co.uk

Journal of Obstetrics and Gynaecology : the Journal of the Institute of Obstetrics and Gynaecology
|December 22, 2007
PubMed
Summary

Women experiencing a waiting time to pregnancy (WTP) over one year, especially those treated for infertility, face increased risks. This includes higher rates of preterm birth and C-section for first-time mothers, impacting neonatal intensive care unit admissions.

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Fertility Preservation in Patients with Severe Ovarian Dysfunction
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Fertility Preservation in Patients with Severe Ovarian Dysfunction

Published on: March 25, 2021

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Last Updated: Jul 9, 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

Measurement of Four Uterine NK Cell Subtypes Using Multiplexed Fluorescent Immunohistochemical Staining in Women with Repeated Implantation Failure
08:29

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Fertility Preservation in Patients with Severe Ovarian Dysfunction
12:03

Fertility Preservation in Patients with Severe Ovarian Dysfunction

Published on: March 25, 2021

Area of Science:

  • Reproductive Medicine
  • Maternal-Fetal Medicine
  • Perinatology

Background:

  • A waiting time to pregnancy (WTP) exceeding one year is common.
  • Understanding its impact on pregnancy outcomes is crucial for maternal and neonatal health.
  • Infertility treatments may influence these outcomes.

Purpose of the Study:

  • To assess if a WTP >1 year increases adverse pregnancy outcomes in healthy women.
  • To compare outcomes between women conceiving spontaneously versus after infertility treatment.
  • To identify specific risks associated with delayed conception.

Main Methods:

  • Retrospective analysis of 992 pregnancies with WTP >1 year.
  • Comparison between women treated for infertility (Group A) and those conceiving spontaneously (Group B).
  • Subgroup analysis of primigravidae (first-time mothers) in both groups (A1 and B1).

Main Results:

  • Primigravidae with WTP >1 year showed a significant increased risk of preterm birth (34-37 weeks).
  • Women treated for infertility (Group A1) had shorter gestations, lower birth weights, and higher NICU admission rates compared to untreated primigravidae (Group B1).
  • Primigravidae in the treated group had a statistically significant higher risk of cesarean births.

Conclusions:

  • Delayed conception (>1 year), particularly with infertility treatment, is associated with adverse pregnancy outcomes in primigravidae.
  • These outcomes include increased preterm birth, lower birth weight, and higher rates of C-sections.
  • Further research is warranted to explore mechanisms and interventions for mitigating these risks.