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What are 'synthetic embryos' and why are scientists making them?

15 June 2023

The first human embryo-like structures have been created from stem cells and reached a landmark stage of development, in a move that could help scientists study the causes of early miscarriages


An embryo developing in the uterus at 8 weeks, 9 weeks and 10 weeks

Miscarriages may be more likely to occur with slow developing embryos

26 March 2023

Using vaginal ultrasound scans to build detailed 3D images that show an embryo's growth could predict which pregnancies are most likely to end in miscarriage


A hair follicle generated from hair organoids - tiny, simple versions of an organ

Hair follicles grown in the lab in a step towards hair loss treatment

21 October 2022

By modifying the embryonic skin cells of mice, researchers created hair follicles that grew up to 3 millimetres long over one month


Synthetic (left) and natural (right) embryos to show comparable brain and heart formation.

Synthetic mouse embryos with rudimentary brain grown in the lab

25 August 2022

Embryo-like structures grown in an incubator instead of a uterus could lead to better treatments for infertility and a range of other medical conditions


Insight into early embryos could explain why some pregnancies fail

Insight into early embryos could explain why some pregnancies fail

17 June 2021

Scientists have discovered key molecular events that shape embryonic development in the second week of gestation, a critical stage when many pregnancies are lost


Monkey-human blastocyst

Human cells grown in monkey embryos raise ethical concerns

15 April 2021

Human-monkey chimeras produced by implanting human stem cells in macaque embryos could be used to study how cells develop, but some ethicists have raised concerns


CRISPR is a powerful technique for editing DNA

‘Scientists are now very sure that the babies really were gene-edited’

29 November 2018

He Jiankui has now presented his controversial work at a gene editing summit in Hong Kong. CRISPR expert Helen O’Neill of University College London was there


test tubes

New techniques may soon make designer babies a reality – are we ready?

15 November 2018

As tests that screen embryos for complex traits become available, it's time to decide how to use these ethically – and where to draw the line


babies

Exclusive: A new test can predict IVF embryos' risk of having a low IQ

15 November 2018

A new genetic test that enables people having IVF to screen out embryos likely to have a low IQ or high disease risk could soon become available in the US


What does China’s monkey breakthrough mean for human cloning?

What does China’s monkey breakthrough mean for human cloning?

24 January 2018

The creation of monkey clones is a big breakthrough, but making a copy of an adult is still not possible and the ethics of cloning remain unchanged


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