New photo Chinese scientist says a second pregnancy is underway

A Chinese scientist who this week claimed to have created the world's first gene-edited babies now says a second pregnancy is underway.

Speaking at a genome summit in Hong Kong, Dr He Jiankui said he was 'proud' of his controversial work, which involved using a powerful tool to modify the DNA of healthy twin embryos.

He added that 'another potential pregnancy' of a gene-edited embryo was in its early stages.

Dr He's claims have not been independently verified, and have sparked outrage from the global science community, with some scientists calling the work 'monstrous'.

Gene editing is banned in Britain, the US many other parts of the world, largely because its long-term effects on mental and physical health are poorly understood.

The technique carries the risk that altered DNA will warp other genes - potentially dangerous mutations that may then be passed down to future generations.

Speaking at a genome summit in Hong Kong, Dr He Jiankui said he was 'proud' of his controversial work, which involved using a powerful tool to modify the DNA of healthy twin babies. Pictured is the scientists at Tuesday's summit

WHAT IS CRISPR-CAS9?

CRISPR-Cas9 is a tool for making precise edits in DNA, discovered in bacteria.

The acronym stands for 'Clustered Regularly Inter-Spaced Palindromic Repeats'.

The technique involves a DNA cutting enzyme and a small tag which tells the enzyme where to cut.

The CRISPR/Cas9 technique uses tags which identify the location of the mutation, and an enzyme, which acts as tiny scissors, to cut DNA in a precise place, allowing small portions of a gene to be removed

By editing this tag, scientists are able to target the enzyme to specific regions of DNA and make precise cuts, wherever they like.

It has been used to 'silence' genes - effectively switching them off.

When cellular machinery repairs the DNA break, it removes a small snip of DNA.

In this way, researchers can precisely turn off specific genes in the genome.

The approach has been used previously to edit the HBB gene responsible for a condition called β-thalassaemia. 

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News Pictures Chinese scientist says a second pregnancy is underway

You don’t have to pack away your bikini just because you’re the wrong side of 20. These body-beautiful stars reveal their secrets to staying in shape and prove you can smoulder in a two-piece, whatever your age. Read on and be bikini inspired!

TEENS
Hayden Panettiere
Size: 8
Age: 18
Height: 5ft 1in
Weight: 8st

To achieve her kick-ass figure, Hayden – who plays cheerleader Claire Bennet in Heroes – follows the ‘quartering’ rule. She eats only a quarter of the food on her plate, then waits 20 minutes before deciding whether she needs to eat again.

Hayden says: “I don’t have a model’s body, but I’m not one of those crazy girls who thinks that they’re fat. I’m OK with what I have.”

Nicollette says: “I don’t like diets – I see it, I eat it! I believe in eating healthily with lots of protein, vegetables and carbs to give you energy.”

kim cattrall

Size: 10-12
Age: 52
Height: 5ft 8in
Weight: 9st 4lb

SATC star Kim swears by gym sessions with Russian kettle bells (traditional cast-iron weights) and the South Beach Diet to give her the body she wants. To avoid overeating, Kim has a radical diet trick – squirting lemon juice on her leftovers – so she won’t carry on picking.

Kim says: “I am no super-thin Hollywood actress. I am built for men who like women to look like women.”
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