Fertilization News and Research

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How Does the Egg Coat Prevent Multiple Fertilization

The surrounding egg coat tightens once a sperm fertilizes an egg, mechanically blocking further sperm from entering and causing the embryo to die.

15 Mar 2024

Scientists Develop First Full Model of Early Human Central Nervous System with Stem Cells

The first stem cell culture method that produces a full model of the early stages of the human central nervous system has been developed by a team of engineers and biologists at the University of Michigan, the Weizmann Institute of Science, and the University of Pennsylvania.

27 Feb 2024

New ACMG Statement Urges Caution with Polygenic Risk Score Testing in Embryo Selection

Should we be using polygenic risk score assessment for embryo selection? Providing in-depth analysis, the Social, Ethical and Legal Issues Committee of the American College of Medical Genetics and Genomics (ACMG) has released a new Points to Consider statement to assist healthcare professionals and patients in understanding the safety and utility of preimplantation genetic testing for polygenic disorders (PGT-P) as a clinical service.

26 Feb 2024

High-Resolution Map Exposes Cellular Pathways to Fertility

An interdisciplinary team mapped the gene expression that takes place in mice during follicle maturation and ovulation using a state-of-the-art method of RNA tagging.

24 Jan 2024

No Consistent Evidence for Sperm Quality Decreasing With Age

Scientists have shown that while male fertility and sperm fitness decrease with age in humans, this tendency does not hold true for other animals. The journal Nature Communications has published the findings.

18 Jan 2024

How 3D DNA Architecture Shapes Cell Fate in Early Embryos

The intricate process of duplicating genetic information, referred to as DNA replication, lies at the heart of the transmission of life from one cell to another and from one organism to the next. This happens by not just simply copying the genetic information; a well-orchestrated sequence of molecular events has to happen at the right time.

21 Dec 2023

Decoding Zebrafish Development: A Comprehensive Gene Expression Atlas

Scientists from the National Institutes of Health have released a comprehensive guide to the development of zebrafish, outlining the gene expression patterns activated in almost every cell type during the initial five days of growth.

19 Dec 2023

Unveiling the Extraordinary Bilateral Gynandromorph Bird

A University of Otago zoologist, Sesquicentennial Distinguished Professor Hamish Spencer, came across an exceptionally uncommon bird during his holiday in Colombia.

12 Dec 2023

Unveiling the Intricacies of Sperm Transformation

Scientists from Stockholm University have revealed the concealed complexities behind the transition of sperm from inert observers to active swimmers.

26 Oct 2023

Identifying QTLs for Improved Nitrogen Use Efficiency in Eggplant

In the pursuit of sustainable agriculture, a key goal is to enhance nitrogen use efficiency (NUE) in crops.

16 Oct 2023

New Atlases Reveal Unprecedented Detail of the Human Brain

In two concurrent projects, scientists at the Karolinska Institutet have played a significant role in producing the most extensive atlases of human brain cells to date.

13 Oct 2023

The Recognition of Polymorphic Csd Proteins Defines Sex in Honeybees

Until now, it has been unknown how a bee’s sex is decided. A team of biologists and chemists from Heinrich Heine University Düsseldorf (HHU) has found a critical gene and the chemical process that goes with it. They describe how this process is analogous to a dice game in the current edition of the scholarly journal Science Advances.

5 Oct 2023

Female Fruit Flies Prioritize Both Genetic Quality and Compatibility When Mating

Genetic quality or genetic compatibility? What do female fruit flies prioritize when mating? Researchers at the University of Zurich show that both factors are important at different stages of the reproductive process and that females use targeted strategies to optimize the fitness of their offspring.

3 Oct 2023