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Related Party Balances and Transactions (Details) - Schedule of Balance Due from Shareholders - USD ($) | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Schedule of the Balance Due from Shareholders [Abstract] |  |  |
Due from shareholders | $ (221,203) | $ 372,103 | $ 2,257,931
Less: allowance for expected credit loss |  | (17,818) | $ (17,059)
Total shareholders amount | $ (221,203) | $ 354,285 |

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- Definition Due from shareholders. + References No definition available. + Details
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Namespace Prefix: | nivf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of other receivables. + References No definition available. + Details
Name: | nivf_OtherReceivablesNet
Namespace Prefix: | nivf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | nivf_ScheduleOfBalanceDueFromShareholdersAbstract
Namespace Prefix: | nivf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of allowance for credit loss on receivable, classified as other and current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant