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 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.

You might also read

Related Articles

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

Sort by
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

Related Experiment Video

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

Ectopic pregnancy.

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
Summary
This summary is machine-generated.

Ectopic pregnancy diagnosis is improving with ultrasound and beta-hCG tests, reducing surgery. Medical treatment is an option, but optimal regimens and surgical approaches require further research.

More Related Videos

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

Related Experiment Videos

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

Area of Science:

  • Reproductive Medicine
  • Obstetrics & Gynecology
  • Medical Diagnostics

Background:

  • Ectopic pregnancy is a significant global cause of maternal morbidity and mortality.
  • Advances in diagnostic tools have improved early detection rates.
  • Current management strategies include medical and surgical interventions.

Purpose of the Study:

  • To review the current state of ectopic pregnancy diagnosis and management.
  • To highlight areas where further research is needed.
  • To discuss the evolving role of medical and surgical treatments.

Main Methods:

  • Review of current literature on ectopic pregnancy diagnosis and treatment.
  • Analysis of diagnostic modalities including transvaginal ultrasonography and beta-hCG measurements.
  • Evaluation of medical (methotrexate) and surgical (salpingectomy vs. salpingostomy) treatment options.

Main Results:

  • Transvaginal ultrasonography and quantitative beta-hCG measurements have decreased the need for diagnostic laparoscopy.
  • Earlier diagnosis allows for medical management with methotrexate in select cases, potentially avoiding surgery.
  • The optimal methotrexate regimen and the comparative benefits of salpingectomy versus salpingostomy remain uncertain.

Conclusions:

  • Diagnostic advancements have improved ectopic pregnancy outcomes.
  • Medical management is increasingly utilized, but optimal protocols are under investigation.
  • Further research is essential to clarify surgical decision-making and optimize medical therapy for ectopic pregnancy.