A group of women in the US claim to have children fathered by aliens - and describe their sexual encounters with extra-terrestrials as the 'best they've ever had'.

Bridget Nielson, from Sedona, Arizona, and Aluna Verse, from Los Angeles, California, are among members of the 'Hybrid Baby Community' who believe their children live on giant alien spaceships.

The pair claim that between them, they have 13 children with aliens - and that the conceptions happen either through artificial insemination or real sexual encounters.

The truth is out there: Bridget Nielson (right), from Arizona, and Aluna Verse (left), from California, are among members of the 'Hybrid Baby Community' who believe their children live on giant alien spaceships

Members of the group believe aliens have been harvesting their DNA to create children that combine the best of both human and alien characteristics over a period several years.

Nielson, 27, said the sex was the 'best ever' and that thousands of women around the world are missing out on such experiences because they don't realise they have had hybrid children.

The former marketing executive refutes claims pointing to a lack of evidence of such encounters with aliens, saying the extra-terrestrials only take women who, on some level, 'want to be taken'.

Although she lives with her father, she claims to have had regular contact with aliens and now has ten alien children - four boys and six girls.

She said: 'They are not just taking our children - they are creating a hybrid race to better humanity.'

The mothers make drawings of what their hybrid children look like and while they have human characteristics, most display reptilian features with big black eyes.

Recalling a sexual encounter with an alien on board a spaceship, Nielson said: 'It was great. It was an incredible super primal, super raw, super primal sexual experience.

'There was a really freedom and we were really going for it. It was the best sex I ever had.'

Belief: Aluna Verse says she was taken on board a spaceship in a 'dream state' and described the sex she had as one of her most 'vivid' memories

Nielson (left) said the sex was the 'best ever' and that thousands of women around the world are missing out because they don't realise they have had hybrid children. Verse (right) believes she has three alien children

Speaking about her own conception, mother-of-three alien children Verse, 23, a video games designer, added: 'I was in a classroom setting with other humans.

'All of sudden I'm sat next to this green reptilian creature and immediately I'm so sexually turned on looking at this being.

'I was very surprised. We're making love in this classroom in front of everyone. Everyone turned their attention to us.'

It sounds crazy and people have asked if I'm off my meds Aluna Verse

She continued: 'It sounds crazy and people have asked if I'm off my meds. But this is really happening.'

Verse says she was taken on board the ship in a 'dream state' and described the sex she had as one of her most 'vivid' memories.

Some of the women in the Hybrid Baby Community, which has mothers aged 19 to some in their sixties, claim to have more than ten children with aliens.

However, they never meet their children on Earth and Nielson said: 'There is a sadness because you can't be with them.

'We believe there may be hundreds of thousands of women across the world who have hybrid babies, they just don't know about them.'

The mothers make drawings of what their hybrid children look like and while they have human characteristics, most display reptilian features with big black eyes

Nielson has failed to tie down a relationship and her friends told her that coming clean would ruin her credibility for a future career in advertising and public relations

Because the women have chosen to be open about their encounters with aliens, they have struggled in the real world.

Nielson has failed to tie down a relationship and her friends told her that coming clean would ruin her credibility for a future career in advertising and public relations.

Her own mother even rejects her story but Nielson said: 'I don't really have normal relationships any more. This has become my normal.

'I know people who are married or have boyfriends and when they tell them it goes down badly.'

The group believe aliens take people from the same family or gene pool, and that they are most interested in breeding with younger generations of women.

People say we are crazy but we are not, this is really happening to us Bridget Nielson

Nielson, who says she lost one alien child to 'devastating' circumstances when it didn't form properly, said aliens take womens' eggs mainly aboard their spaceships, but that it can happen on Earth.

She said she once saw a ship in the sky and, moments later, her ovaries ached.

For women who believe they have no alien children, Nielson said there are certain things they can look for in their lives that might suggest otherwise.

She said: 'There are signs that you can look for such as re-occurring dreams about doctor's offices or classrooms, missing times or false pregnancies. These could mean you have hybrid children.'

The pair now have plans where all the hybrid mothers can live together in the same home to act as a safe place for their children to visit.