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Related Concept Videos

Oogenesis02:07

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
Oogenesis01:22

Oogenesis

Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
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: Jun 22, 2026

The Immediate Partial Removal of Cumulus-Oocyte Complexes: A Refined Approach for Rapid Observation of In Vitro Fertilization
08:06

The Immediate Partial Removal of Cumulus-Oocyte Complexes: A Refined Approach for Rapid Observation of In Vitro Fertilization

Published on: October 18, 2024

Does oocyte donation equal cesarean delivery?

Iris Ohel1, Eyal Sheiner

  • 1Faculty of Health Sciences, Department of Obstetrics and Gynecology, Soroka University Medical Center, Ben Gurion University of the Negev, Beer-Sheva, Israel.

The Journal of Maternal-Fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians
|June 6, 2009
PubMed
Summary

Oocyte donation pregnancies show a significantly higher rate of Cesarean delivery (CD) compared to the general population. While obstetric outcomes were favorable, awareness of risks associated with elective CD is crucial.

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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: Jun 22, 2026

The Immediate Partial Removal of Cumulus-Oocyte Complexes: A Refined Approach for Rapid Observation of In Vitro Fertilization
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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
  • Obstetrics and Gynecology
  • Perinatal Medicine

Background:

  • Cesarean delivery (CD) rates are increasing globally and represent the most common major surgical procedure for women in the US.
  • Pregnancies resulting from infertility treatments, including oocyte donation, are often managed as high-risk pregnancies.

Purpose of the Study:

  • To compare the modes of delivery and obstetric outcomes in pregnancies following oocyte donation with those in the general population.
  • To assess the association between oocyte donation and Cesarean delivery rates.

Main Methods:

  • Retrospective analysis of deliveries occurring in 2007 at Soroka University Medical Center.
  • Comparison of a subgroup of eight oocyte donation pregnancies with 12,611 total deliveries.
  • Statistical analysis using the Fisher exact test for categorical variables.

Main Results:

  • Oocyte donation pregnancies were significantly associated with Cesarean delivery (CD), with an odds ratio of 29.1 (87.5% vs. 19.4%).
  • Obstetric outcomes, including Apgar scores, birthweight, and gestational age, were generally favorable in the oocyte donation group.
  • The study identified a markedly higher incidence of CD in women undergoing oocyte donation.

Conclusions:

  • Pregnancies conceived via oocyte donation have a substantially elevated risk of Cesarean delivery.
  • While neonatal outcomes were positive, pregnant women and healthcare providers should be informed about the increased likelihood of CD and its potential risks.
  • Evidence-based decision-making regarding elective Cesarean delivery versus vaginal birth is essential, considering the growing body of research on the topic.