Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Meiosis vs. Mitosis02:57

Meiosis vs. Mitosis

74.3K
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
74.3K
Regression Toward the Mean01:52

Regression Toward the Mean

7.3K
Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
7.3K
Ovarian Cycle01:27

Ovarian Cycle

5.3K
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...
5.3K
Probability Laws01:49

Probability Laws

45.1K
Overview
45.1K
Teratogenicity01:07

Teratogenicity

4.5K
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
4.5K
Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

4.4K
Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility,...
4.4K

You might also read

Related Articles

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

Sort by
Same author

Evaluating the quality of systematic reviews and meta-analyses published in behaviour analysis journals: An umbrella review.

PloS one·2026
Same author

On the importance of relativistic corrections to the vibrational averaging of molecular properties: A zeroth-order regular approximation study on selected mercury compounds.

The Journal of chemical physics·2026
Same author

Traveller mothers: Obstetric and neonatal outcomes in an Irish maternity unit.

International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics·2025
Same author

The impact of electronic cigarettes on pregnancy and childhood health outcomes: the ECHO study-a protocol for a multicentre, prospective, observational, cohort.

Archives of gynecology and obstetrics·2025
Same author

Accuracy of ultrasound estimation of fetal weight in twin pregnancy.

International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics·2025
Same author

Labor roulette: the probability of achieving spontaneous labor in normal-risk nulliparous patients.

American journal of obstetrics & gynecology MFM·2025

Related Experiment Video

Updated: Apr 5, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
09:51

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

Published on: March 21, 2018

20.6K

Improved Perinatal Mortality in Twins--Changing Practice and Technologies.

Mark P Hehir1, Aoife Mctiernan2, Aisling Martin3

  • 1RCSI Academic Unit, Obstetrics and Gynaecology, Dublin, Ireland.

American Journal of Perinatology
|August 22, 2015
PubMed
Summary

Perinatal mortality in twin pregnancies significantly decreased over 17 years, with fewer deaths from twin-to-twin transfusion syndrome (TTTS). Cesarean delivery rates, however, steadily increased during this period.

More Related Videos

Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye
09:52

Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye

Published on: September 5, 2011

27.9K
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
09:04

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

Published on: September 5, 2011

15.5K

Related Experiment Videos

Last Updated: Apr 5, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
09:51

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

Published on: March 21, 2018

20.6K
Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye
09:52

Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye

Published on: September 5, 2011

27.9K
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
09:04

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

Published on: September 5, 2011

15.5K

Area of Science:

  • Obstetrics and Gynecology
  • Perinatology
  • Neonatal Medicine

Background:

  • Twin pregnancies are associated with higher risks of perinatal mortality compared to singleton pregnancies.
  • Understanding trends in perinatal mortality and delivery modes is crucial for improving outcomes in twin gestations.

Purpose of the Study:

  • To examine trends in perinatal mortality rates for twin pregnancies over a 17-year period.
  • To analyze changes in the mode of delivery for twin gestations.
  • To identify the primary causes of death in twin perinatal mortality.

Main Methods:

  • Retrospective cohort study conducted at three tertiary referral centers from 1996 to 2012.
  • Inclusion criteria: normally formed twin infants > 500g birth weight.
  • Data collected on perinatal mortality (intrauterine and early neonatal deaths) and cesarean delivery rates.

Main Results:

  • Perinatal mortality rate in twins decreased from 21.5/1,000 infants over the study period (p=0.0006).
  • Cesarean delivery rates in twin gestations increased significantly (p<0.0001), reaching 62% by 2012.
  • Prematurity (<26 weeks) was the leading cause of death, followed by twin-to-twin transfusion syndrome (TTTS), which showed a decreasing contribution to mortality (p=0.008).

Conclusions:

  • Perinatal mortality in twin pregnancies improved significantly between 1996 and 2012.
  • Increased cesarean delivery rates did not appear to negatively impact the overall improvement in perinatal outcomes.
  • While prematurity remains the primary cause of mortality, the declining impact of TTTS is a positive trend.