Opinions differ on the precise moment at which the human embryo attains moral status.
Stem-cell scientists have to work within many limitations placed on their research. One of these is the 14-day rule that outlaws research on pure human embryos over two weeks old.
PHOTOCREO Michal Bednarek/Shutterstock.com
It's a landmark case but there are many unknowns.
Almost half of pregnant women in Australia said they drank alcohol before they knew they were pregnant.
Recent animal studies show the developing embryo is highly susceptible to environmental changes and the actions of the mother in early stages of pregnancy.
There’s a battle for resources going on in there.
Embryos greedily want more resources than their fair share. New research investigates how early in evolution their hormonal tactics arose.
A mouse embryo, like this one, looks a lot like that of a fish, a frog or a human at a certain point in its development.
Scientists have discovered the genetic "switch" that causes many animals, including fish, frogs and humans, to look the same at a certain point in embryonic development.
Genetic changes to embryos will not only affect the person that embryo becomes but also all their descendants.
While gene editing offers the exciting potential for disease therapies, using it on human embryos opens up a can of worms.
Knowledge is power. And IVF is expensive.
Clinics aren't compelled to disclose their success rates, so it's impossible to compare all clinics. Even when they do, the pretty graphs on clinic websites can be difficult to understand.
When cells divide, sometimes chromosomes don’t wind up where they need to go.
Embryo via www.shutterstock.com.
Aneuploidy – when a cell has an irregular number of chromosomes – is a major cause of pregnancy loss. Scientists may have uncovered a gene that increases the risk of aneuploidy.
Embryos matter because of what they mean to those for whom they were generated.
Over the past two decades, the frozen preservation of embryos has become routine practice in IVF. What currently happens to embryos next is controlled by overlapping and complicated rules that confuse…
By breaking a biological signalling system in the cells of embryos, scientists have discovered a way to change a cell’s destiny…
Sperm is injected into an egg cell using a microscope at an IVF clinic.
Babies born through IVF procedures are at greater risk of developing heart problems, according to research that suggests…