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illustration of human oocyte
Mammalian Oocytes Store mRNA in Newly Found Membraneless Structure
The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.
Mammalian Oocytes Store mRNA in Newly Found Membraneless Structure
Mammalian Oocytes Store mRNA in Newly Found Membraneless Structure

The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.

The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.

reproductive biology
dark image with red ring
How Immature Egg Cells in Ovaries Resist Aging
Shafaq Zia | Aug 4, 2022 | 3 min read
The cells’ mitochondria skip a key metabolic reaction that takes place in other cells in the body, a study finds.
A gametophyte of the brown alga <em>Desmarestia dudresnayi</em> that has both male and female reproductive structures
Meet the Algae That Went from Male/Female to Hermaphroditic
Natalia Mesa, PhD | Aug 1, 2022 | 2 min read
A study suggests that several species of brown algae may have independently evolved to express both sexes simultaneously, and it’s likely that female algae evolved male traits—not the other way around.
Green fruit hanging in a tree
Trees’ Scent Tricks Hornets Into Shuttling Seeds
Natalia Mesa, PhD | Jun 30, 2022 | 4 min read
Agarwood fruit smells like prey, luring carnivorous hornets, a study suggests.
Four pregnant women sitting in chairs
Epigenetic Changes to Placenta Correlate with Maternal Depression
Chloe Tenn | Feb 1, 2022 | 2 min read
An epigenome-wide association study found more than a dozen methylation changes in placental DNA that correlated with expectant mothers’ self-reports of depression and stress during their pregnancy.
Chelonibia testudinaria barnacle on turtle shell
Some Barnacles Can Move Around to Improve Feeding Position
Chloe Tenn | Oct 6, 2021 | 7 min read
The Scientist spoke with marine biologist and barnacle researcher John Zardus about why turtle barnacles—previously thought to be immobile—in fact slowly travel. He thinks the answer is food.
Pink-toned illustration of the uterus with a zoom of the inflamed cervix and of the uterine endometrium and immune cells found there
Infographic: Research Questions to Be Tackled by Uterus Transplants
Jef Akst | Aug 1, 2021 | 2 min read
Scientists are banking various samples from recipients of donated uteruses to learn all they can about the biology of the organ, and about transplantation more generally.
A New View of My Own Past
Jef Akst | Aug 1, 2021 | 6 min read
Hearing others’ perspectives on infertility and pregnancy has me reconsidering my own reproductive journey.
Infographic: Maternal Microbiota Has Lasting Effects on Offspring
Carolyn A. Thomson and Kathy D. McCoy | Aug 1, 2021 | 3 min read
Work in rodents shows that the bacteria living in a mother’s gut can produce immunomodulatory metabolites and influence the production of maternal antibodies—both of which can affect her offspring’s development.
The Role of Mom’s Microbes During Pregnancy
Carolyn A. Thomson and Kathy D. McCoy | Aug 1, 2021 | 10+ min read
Bacteria in the gut influence the production of antibodies and themselves secrete metabolites. In a pregnant woman, these compounds may influence immune development of her fetus.
An illustration of flowers in the shape of the female reproductive tract
Uterus Transplants Hit the Clinic
Jef Akst | Aug 1, 2021 | 10+ min read
With human research trials resulting in dozens of successful deliveries in the US and abroad, doctors move toward offering the surgery clinically, while working to learn all they can about uterine and transplant biology from the still-rare procedure.
Opinion: How Biomedicine Could Transform Human Reproduction
Henry T. Greely | Aug 1, 2021 | 3 min read
CRISPR and other innovations are likely to open up a wealth of new options for how people have children.
A collection of headshots
Contributors
The Scientist Staff | Aug 1, 2021 | 4 min read
Meet some of the people featured in the August 2021 issue of The Scientist.
Illustration of two rats, one male and one female, that are surgically joined. The male has a uterus transplanted in, and both have embryos transplanted into their uteruses.
Study that Impregnated Male Rats Stirs Controversy
Andy Tay | Jun 25, 2021 | 7 min read
A combination of approaches, including uterus transplantation and the joining of two animals’ circulatory systems, allowed males to bear pups, according to a preprint. But some experts say the experiments were not justified.  
pcos polycystic ovary syndrome hormone amh epigenetics methylation transgenerational inheritance
Polycystic Ovary Syndrome May Be Inherited Epigenetically
Katarina Zimmer | Feb 9, 2021 | 5 min read
Female mice modeling the hormonal disorder can pass symptoms down for several generations, likely via changes in genome methylation that are similarly observed in women with PCOS.
Eight Proteins Turn Mouse Stem Cells into Egglike Cells
Ashley Yeager | Dec 16, 2020 | 3 min read
The identification of the transcription factors that elicit oocyte growth will aid reproductive biology research and might help women with fertility issues, scientists say.  
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.  
Swamp Wallabies Can Have Two Separate Pregnancies at Once
Lisa Winter | Mar 3, 2020 | 3 min read
Before the joey is born, another pregnancy has already started.
Endocrinologist and Reproductive Physiologist Wayne Bardin Dies
Catherine Offord | Nov 18, 2019 | 3 min read
Bardin’s work helped lead to the development of long-acting contraceptive devices for women.
Human Testicles Contain Endocannabinoid System Components
Ruth Williams | Sep 19, 2019 | 3 min read
Proteins that synthesize, bind, and degrade endocannabinoids are present in the body’s sperm factories, suggesting that the use of cannabis may directly affect them.
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