Species of Algae With Three Sexes Identified in Japanese River
Researchers on quest to understand how different sexes first evolved. For 30 years, University of Tokyo Associate Professor Hisayoshi Nozaki has traveled an hour west…
Reproductive Biology
New Research Helps Explain the Diversity of Life and “Paradox of Sex”
New University of Arizona research finds that sexual reproduction and multicellularity drive diversity among different species. There are huge differences in species numbers among…
How Organisms Have Evolved To Address Imbalances in Sex Chromosomes
A new study led by an Iowa State University scientist sheds light on how organisms have evolved to address imbalances in sex chromosomes. The study…
Scientists Discover That Mating Can Cause Epigenetic Changes That Last for 300 Generations
University of Maryland scientists discover that match matters: The right combination of parents in nematode worms can turn a gene off indefinitely. Evidence suggests that…
Uncovering the Mysteries of Milk: Using Genomic Data to Profile the Living Cells in Human Breast Milk
PhD student Sarah Nyquist applies computational methods to understudied areas of reproductive health, such as the cellular composition of breast milk. Sarah Nyquist got her…
Higher Risk of Pre-eclampsia and Hypertension in IVF Pregnancies Derived From Frozen-Thawed Embryos
A large cohort study drawn from the national IVF registry of France, which included almost 70,000 pregnancies delivered after 22 weeks gestation between 2013 and…
Purging Bad Mutations: Males Help Keep Populations Genetically Healthy
A few males are enough to fertilize all the females. The number of males, therefore, has little bearing on a population’s growth. However, they are…
Sperm Evolution Becomes Supercharged Only When They Swim Inside Females
Sperm size varies dramatically among different animal species. But why is sperm size so variable when they share the same job — to fertilize eggs?…
New Hope for Infertile Men – Mice Could Hold the Secret
Male infertility affects more than 20 million men globally and is a contributing cause to around 50% of infertility in couples. Frequently, male infertility is…
Largest-Ever Effort to Artificially Inseminate Sharks – And the Occasional “Virgin Birth”
It’s a tough time to be a shark. Pollution, industrialized fishing, and climate change threaten marine life, and the populations of many top ocean predators…
Extinction of the Human Species? Harvard Researchers Say Not to Panic Over Declining Sperm Counts
An alternative explanation of recent findings of declining sperm counts: normal, non-pathological variation. A new study from the Harvard GenderSci Lab in the journal Human Fertility,…
Early Human Embryo Structure Created With Stem Cells in Advance for Fertility Research
Exeter scientists have discovered a simple, efficient way to recreate the early structure of the human embryo from stem cells in the laboratory. The new…
In Tune With the Moon: Female Menstrual Cycle Influenced by Moonlight and Even the Moon’s Gravity
The blog “Ladyplanet. Natürlich Frau sein” is quite certain: “Our cycle is linked to that of the moon. The most obvious connection is the length…
Twin Peaks: More Human Twins Are Being Born Than Ever Before
More human twins are being born than ever before, according to the first comprehensive, global overview published on March 12, 2021, in Human Reproduction,[1] one…
MIT Biologists and Mathematicians Reveal How Egg Cells Get So Big
Oocyte growth relies on physical phenomena that drive smaller cells to dump their contents into a larger cell. Egg cells are by far the largest…
Brain Imaging Reveals: Not All Monogamous Mammals Are “Wired for Love” in the Same Way
Lemurs Show There’s No Single Formula for Lasting Love Humans aren’t the only mammals that form long-term bonds with a single, special mate — some…
Anti-Aphrodisiac: Male Butterflies Mark Their Mates With Repulsive Smell During Sex to “Turn Off” Other Suitors
Butterflies have evolved to produce a strongly scented chemical in their genitals that they leave behind after sex to deter other males from pursuing their…
New Climate Change Research: Future Too Warm for Baby Sharks
New research has found as climate change causes the world’s oceans to warm, baby sharks are born smaller, exhausted, undernourished, and into environments that are…