Jove
Visualize
Contáctanos

Videos de Conceptos Relacionados

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...
Crossing Over01:34

Crossing Over

Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
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...
Understanding Species and Reproductive Barriers01:17

Understanding Species and Reproductive Barriers

A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...
Test Cross01:39

Test Cross

Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.
Test Cross01:39

Test Cross

Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Recommendations from the 2024 Australian evidence-based guideline for unexplained infertility: ADAPTE process from the ESHRE evidence-based guideline on unexplained infertility.

The Medical journal of Australia·2024
Same author

Patient and professional perspectives about using in vitro fertilisation add-ons in the UK and Australia: a qualitative study.

BMJ open·2023
Same author

Is our public research money well spent? Publication of research outputs from Health Research Council of New Zealand-funded studies: a cross-sectional study.

BMJ open·2023
Same author

VALUE study: a protocol for a qualitative semi-structured interview study of IVF add-ons use by patients, clinicians and embryologists in the UK and Australia.

BMJ open·2021
Same author

IVF and IUI in couples with unexplained infertility (FIIX study): study protocol of a non-inferiority randomized controlled trial.

Human reproduction open·2020
Same author

Clinician Identification of Birth Asphyxia Using Intrapartum Cardiotocography Among Neonates With and Without Encephalopathy in New Zealand.

JAMA network open·2020
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Video Experimental Relacionado

Updated: Jul 6, 2026

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
07:34

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Published on: August 22, 2018

El embarazo ectópico es un embarazo ectópico.

Cynthia M Farquhar1

  • 1Department of Obstetrics and Gynaecology, National Womens' Health at Auckland City Hospital, University of Auckland, Private Bag 92019, Auckland, New Zealand. c.farquhar@auckland.ac.nz

Lancet (London, England)
|August 16, 2005
PubMed
Resumen
Este resumen es generado por máquina.

El diagnóstico del embarazo ectópico está mejorando con las pruebas de ultrasonido y beta-hCG, reduciendo la cirugía. El tratamiento médico es una opción, pero los regímenes óptimos y los enfoques quirúrgicos requieren más investigación.

Más Videos Relacionados

Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination
05:36

Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination

Published on: July 7, 2023

Dissection and Grading of Ovarian Development in Wild-Type Female Insects
04:41

Dissection and Grading of Ovarian Development in Wild-Type Female Insects

Published on: July 14, 2023

Videos de Experimentos Relacionados

Last Updated: Jul 6, 2026

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
07:34

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Published on: August 22, 2018

Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination
05:36

Inducing Pseudopregnancy in Female Mice Without the Need for Vasectomized Males Prior to Non-Surgical Embryo Transfer or Artificial Insemination

Published on: July 7, 2023

Dissection and Grading of Ovarian Development in Wild-Type Female Insects
04:41

Dissection and Grading of Ovarian Development in Wild-Type Female Insects

Published on: July 14, 2023

Área de la Ciencia:

  • La Medicina Reproductiva es una de ellas.
  • Obstetricia y Ginecología.
  • Diagnóstico médico Diagnóstico médico

Sus antecedentes:

  • El embarazo ectópico es una causa global significativa de morbilidad y mortalidad materna.
  • Los avances en las herramientas de diagnóstico han mejorado las tasas de detección temprana.
  • Las actuales estrategias de manejo incluyen intervenciones médicas y quirúrgicas.

Objetivo del estudio:

  • Revisar el estado actual del diagnóstico y manejo del embarazo ectópico.
  • Para resaltar las áreas donde se necesita más investigación.
  • Para discutir el papel en evolución de los tratamientos médicos y quirúrgicos.

Principales métodos:

  • Revisión de la literatura actual sobre el diagnóstico y tratamiento del embarazo ectópico.
  • Análisis de las modalidades de diagnóstico que incluyen ultrasonografía transvaginal y mediciones de beta-hCG.
  • Evaluación de las opciones de tratamiento médico (metotrexato) y quirúrgico (salpingectomía vs. salpingostomía).

Principales resultados:

  • La ecografía transvaginal y las mediciones cuantitativas de beta-hCG han disminuido la necesidad de laparoscopia diagnóstica.
  • El diagnóstico precoz permite el manejo médico con metotrexato en casos selectos, evitando potencialmente la cirugía.
  • El régimen óptimo de metotrexato y los beneficios comparativos de la salpingectomía frente a la salpingostomía siguen siendo inciertos.

Conclusiones:

  • Los avances en el diagnóstico han mejorado los resultados del embarazo ectópico.
  • El manejo médico se utiliza cada vez más, pero los protocolos óptimos están bajo investigación.
  • La investigación adicional es esencial para aclarar la toma de decisiones quirúrgicas y optimizar la terapia médica para el embarazo ectópico.