'Sperminator' gives 50th free semen donation to teen but homeless lesbian ...

New York college professor, Ari Nagel – also known as The Sperminator – has made his 50th semen donation in time for Father's Day.

The 43-year-old picked Kaienja Garrick as the mother to his latest child – who has already been named Kaidee – and the 18-year-old mother-to-be is currently homeless and stays at East River Family Center in East Harlem.

The little girl due July 12 will be the 15th baby he has helped conceive in just one year and he deposited his contribution shortly after they met at Manhattan Beach last fall after she found his services online.

'I will never forget the day I conceive you you,' Garrick posted on Facebook on Mother's Day last month about the day Nagel left his bodily fluids in a cup.

Ari Nagel – also known as The Sperminator – has made his 50th semen donation. He is pictured with mother-to-be Kaienja Garrick (center right), her partner Decontee Slobert (left) and her seven-year-old sister (right)

Ari Nagel – also known as The Sperminator – has made his 50th semen donation. He is pictured with mother-to-be Kaienja Garrick (center right), her partner Decontee Slobert (left) and her seven-year-old sister (right)

Garrick said about her daughter Kaidee - due July 12 - 'I will never forget the day I conceive you you'. Nagel deposited his sperm into a cup shortly after meeting her on Manhattan Beach, New York last year

Garrick said about her daughter Kaidee - due July 12 - 'I will never forget the day I conceive you you'. Nagel deposited his sperm into a cup shortly after meeting her on Manhattan Beach, New York last year

CUNY math professor Nagel, 43, already has 48 children from mothers around the world

CUNY math professor Nagel, 43, already has 48 children from mothers around the world 

CUNY math professor Nagel's brood adds up to a total of 48 currently and he famously donates sperm for free.

Garrick - who is in a same-sex relationship - was inspired to get pregnant because she practically raised her seven-year-old sister before moving out her mother's Jamaica, Queens home due to arguments, she says.

She searched online to avoid paying out big money to conceive.

'May not be here yet but just know both of your mothers' love you and we just can't wait to meet you kaidee see you soon my princess & happy mother's Day to all the amazing mothers aunts grandmothers nieces cousins or however you are considered a mother,' Garrick added in a Facebook post.

She and her girlfriend Decontee Slobert are getting ready for the arrival by asking people to buy items from a baby registry that add up to more than $2,000.

Her Georgia-based father Keron Garrick helped plan a baby shower in May where Nagel was present and gifted her a Google reading device.

Some of Nagel's other mothers attended the shower but Garrick arrived late and didn't get to meet them all.

Kaidee Aria Slobert will be raised in an apartment after Garrick and her homeless partner get a voucher for accommodation

Kaidee Aria Slobert will be raised in an apartment after Garrick and her homeless partner get a voucher for accommodation

The teenagers attended prom on Friday as 'pregnant mommies' and Nagel thinks they'll make great parents

The teenagers attended prom on Friday as 'pregnant mommies' and Nagel thinks they'll make great parents

The homeless parents-to-be are asking people for gifts that amount to around $2,000

The homeless parents-to-be are asking people for gifts that amount to around $2,000

'They

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