<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-08-07</periodOfReport>

    <issuer>
        <issuerCik>0001339005</issuerCik>
        <issuerName>FEMASYS INC</issuerName>
        <issuerTradingSymbol>FEMY</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001326487</rptOwnerCik>
            <rptOwnerName>Elefant Dov</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O FEMASYS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3950 JOHNS CREEK COURT, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>SUWANEE</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30024</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>true</isOfficer>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2026-08-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15625</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.2</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15625</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock Purchase Warrant</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.95</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2026-08-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15625</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2026-08-10</value>
            </exerciseDate>
            <expirationDate>
                <value>2029-08-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock, par value $0.001 per share</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15625</value>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15625</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock Purchase Warrant (Milestone)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.95</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2026-08-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15625</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2027-08-10</value>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F5"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock, par value $0.001 per share</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15625</value>
                    <footnoteId id="F3"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15625</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The purchase price paid by the reporting person for the Shares was $3.20 per share pursuant to the Securities Purchase Agreement, dated as of August 7, 2026, by and among Femasys Inc. and the purchasers party thereto.</footnote>
        <footnote id="F2">Holder may, at its option, exercise the Common Warrant, subject to the terms and conditions thereof, at an exercise price of $2.95 per share of Common Stock. The exercise price is subject to adjustment in accordance with the terms of the Common Warrant and will be subject to standard adjustments in the event of any stock split, stock dividend, stock combination, recapitalization or other similar transactions.</footnote>
        <footnote id="F3">The Holder's ability to exercise the subject Warrant for shares of Common Stock is subject to certain limitations, in accordance with rules of the Nasdaq Capital Market.</footnote>
        <footnote id="F4">The reported securities were purchased by the reporting person for an aggregate amount of $50,000.</footnote>
        <footnote id="F5">The Common Warrant (Milestone) is exercisable only from and after the Milestone Date, being the first date on or after August 10, 2027 on which both (i) the Company has achieved U.S. revenue of $1,500,000 for any fiscal quarter, as reported in a Form 10-Q or Form 10-K, and (ii) the volume-weighted average price of the Common Stock has satisfied certain price conditions specified in the warrant. The warrant expires on the earlier of (i) three years after the effective date of a registration statement registering the resale of the Warrant Shares and (ii) 45 days after the Company delivers notice that the Milestone Date has occurred. As of the date of this report, neither the Milestone Date nor the expiration date is determinable.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Kathy Lee-Sepsick, Attorney-in-fact</signatureName>
        <signatureDate>2026-08-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
