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Close-up of baby olive ridley sea turtle (Lepidochelys olivacea)
Moving Sea Turtle Eggs May Affect Hatchling Development

Hatchlings from eggs incubated in a natural nest were larger, exhibited faster neuronal development, and performed better on a motor activity test than those from eggs that were incubated in a hatchery, a study finds.

Moving Sea Turtle Eggs May Affect Hatchling Development
Moving Sea Turtle Eggs May Affect Hatchling Development

Hatchlings from eggs incubated in a natural nest were larger, exhibited faster neuronal development, and performed better on a motor activity test than those from eggs that were incubated in a hatchery, a study finds.

Hatchlings from eggs incubated in a natural nest were larger, exhibited faster neuronal development, and performed better on a motor activity test than those from eggs that were incubated in a hatchery, a study finds.

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Women’s Cervical Mucus Prefers Some Sperm Over Others 
Abby Olena, PhD | Aug 18, 2020 | 3 min read
In human male-female pairs with a less similar suite of genes for human leukocyte antigens, sperm fare better when exposed to cervical mucus.
Single-Cell Analysis of Ovarian Cortex Fails to Find Stem Cells
Amy Schleunes | Mar 6, 2020 | 5 min read
The controversial oogonial stem cells eluded a team of Swedish researchers who mapped high-quality tissue samples of the human ovary, prompting more questions about the cells’ existence.  
Aneuploidy Could Explain Variability in Female Fertility: Study
Catherine Offord | Jan 13, 2020 | 2 min read
Eggs from girls and from older women show higher rates of errors in chromosome number.
Image of the Day: Self-Insemination
Carolyn Wilke | Feb 1, 2019 | 1 min read
Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.
Image of the Day: Eggshell Edifice
The Scientist Staff and The Scientist Staff | Apr 6, 2018 | 1 min read
A new 3-D model plumbs the molecular intricacies of eggshell composition.
Researchers Cryopreserve Coral Sperm
Catherine Offord | Feb 1, 2018 | 5 min read
A project aims to preserve samples of the climate change–vulnerable animals for future restoration.
Long Egg Incubations May Have Doomed the Dinosaurs
Diana Kwon | Jan 4, 2017 | 1 min read
An investigation of fossilized teeth reveals that some dinosaurs took more than six months to hatch, hindering their abilities to procreate quickly and efficiently.
A Scrambled Mess
Karen Schindler | May 1, 2016 | 10+ min read
Why do so many human eggs have the wrong number of chromosomes?
Haploid Stem Cells Created
Catherine Offord | Mar 18, 2016 | 2 min read
A method that forces human eggs to divide can produce embryonic stem cells capable of division and differentiation with only one copy of each gene.
Call for Germline Editing Moratorium
Jef Akst | Mar 13, 2015 | 2 min read
In response to speculation that groups have edited the DNA of human embryos, researchers request that gene editing of human reproductive cells be halted.
Toward Lab-Grown Gametes
Tracy Vence | Dec 30, 2014 | 1 min read
From stem cells, scientists generate early egg- and sperm-like cells in vitro.
Treating Egg Allergies with Eggs
Hayley Dunning | Jul 19, 2012 | 1 min read
Introducing tiny amounts of powdered egg into the diets of allergic children can cure the affliction.
Ovarian Stem Cell Debate
Ed Yong | Jul 9, 2012 | 3 min read
Opinion is divided on a new paper showing that adult ovaries do not contain egg-making stem cells, contrary to the findings of two recent studies that themselves appeared to overturn longstanding dogma.
Cretaceous Easter Eggs
Cristina Luiggi | Apr 9, 2012 | 1 min read
Researchers discover a 70-million-year-old egg that belonged to a small, bird-like meat-eating dinosaur.
A Gamete Matchmaker
Hannah Waters | Mar 22, 2012 | 3 min read
Chemical cues dispersed by mussel eggs may attract sperm that are their perfect match.
Our own 60 mutations
Jef Akst | Jun 15, 2011 | 1 min read
New estimates of human mutation suggest that each of us harbor approximately 60 novel genetic mutations.
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