Filed Pursuant to Rule 424(b)(3)
Registration No. 333-292523
PROSPECTUS

Femasys Inc.
68,416,943 Shares
Common Stock
This prospectus relates to the offer and resale from time to time by the selling stockholders named in this prospectus of up to an aggregate of 68,416,943 shares of our common stock, par value $0.001 per share. These shares consist of (i) 19,281,254 shares of common stock issuable upon conversion of senior secured convertible notes, (ii) 16,378,563 shares of common stock issuable upon the exercise of Series A-1 common stock purchase warrants, (iii) 16,378,563 shares of common stock issuable upon the exercise of Series B-1 common stock purchase warrants and (iv) 16,378,563 shares of common stock issuable upon the exercise of Series C-1 common stock purchase warrants, in each case, that were initially issued in a private placement to certain institutional and accredited investors as part of a private placement completed on two closings, November 7, 2025 and November 26, 2025.
Our registration of the securities covered by this prospectus does not mean that the selling stockholders will offer or sell any of the shares of common stock. The selling stockholders may sell or otherwise dispose of the shares of common stock publicly or through private transactions at prevailing market prices or at negotiated prices. We provide more information about how the selling stockholders may sell their shares in the section entitled “Plan of Distribution.”
We will not receive any proceeds from the sale of shares of common stock by the selling stockholders. We will, however, receive the proceeds from any exercise of the warrants for cash.
Our common stock is listed on the Nasdaq Capital Market (“Nasdaq”) under the symbol “FEMY.” On December 30, 2025, the last reported per share price of our common stock on the Nasdaq was $0.5730 per share.
Investing in our common stock involves a high degree of risk. Before deciding whether to invest in our securities, you should consider carefully the risks that we have described under the caption “Risk Factors” in the documents incorporated by reference into this prospectus.
Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.
The date of this prospectus is January 9, 2026.