Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Intrauterine Drug Delivery Systems

Intrauterine Drug Delivery Systems

Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...

Nondisjunction

Nondisjunction

During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.

Nondisjunction

Nondisjunction

During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.

Nondisjunction

Nondisjunction

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold sister...

Reproductive Cloning

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...

Ovarian Cycle

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

The cytokine Prokineticin-1 in preterm labor with and without intra-amniotic inflammation.

Journal of perinatal medicine·2026

Same author

[Autoimmune female infertility in 2025].

La Revue de medecine interne·2025

Same author

[How to gather consent in a gynecology consultation? The patient's point of view].

Gynecologie, obstetrique, fertilite & senologie·2025

Same author

PFAS exposure during pregnancy: Implications for placental health and functioning.

Environment international·2025

Same author

Antagonisation of Prokineticin Receptor-2 Attenuates Preeclampsia Symptoms.

Journal of cellular and molecular medicine·2025

Same author

IROND-L: study protocol for a French prospective, quasi-experimental, multicentre trial to examine the impact of a coordinated multidisciplinary approach for women victims of violence.

BMJ open·2024

Search research articles

Related Experiment Video

Updated: Jul 16, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators

Published on: March 21, 2018

[Twin delivery].

Jean-Patrick Schaal¹, Véronique Equy, Catherine Thong-Vanh

¹Département de gynécologie obstétrique, CHU de Grenoble, BP 217, 38043 Grenoble. jpschaal@chu-grenoble.fr

La Revue Du Praticien

|March 14, 2007

Summary

Twin pregnancies present complex obstetrical challenges, increasing risks for both mother and babies, especially the second twin. Careful management, including timely induction and judicious C-section use, is crucial for better outcomes.

More Related Videos

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

Published on: September 5, 2011

Related Experiment Videos

Last Updated: Jul 16, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators

Published on: March 21, 2018

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

Published on: September 5, 2011

Area of Science:

Obstetrics and Gynecology
Maternal-Fetal Medicine
Perinatology

Context:

Twin pregnancies are increasing, posing significant challenges beyond therapeutic success.
These pregnancies require specialized obstetric management due to higher risks.

Purpose:

To highlight the complex obstetrical challenges associated with twin pregnancies.
To discuss management strategies for twin deliveries, focusing on potential complications and interventions.

Summary:

Twin delivery is associated with increased morbidity and mortality compared to singleton delivery, particularly for the second twin.
Common difficulties include dystocic presentations, prolonged labor, and cord prolapse.
Rare complications like interlocking or conjoined twins require specific expertise.
Labor induction between 38-39 weeks is recommended.
Cesarean section is indicated for prematurity or breech presentation of the first twin.
Vaginal delivery is feasible in select cases, with internal version/breech extraction for the second twin if needed.
Active management of the third stage of labor is essential to prevent postpartum hemorrhage due to uterine atony.

Impact:

Provides guidance for optimizing the management of twin pregnancies.
Aims to reduce maternal and neonatal morbidity and mortality associated with twin deliveries.
Emphasizes the need for skilled obstetric care in managing complex multiple gestations.