Through a private stock placement Evofem Biosciences raised $30 million and said a second tranche is expected to provide up to $50 million more as the company gets closer to asking for regulatory approval of its birth control gel.

Evofem developed amphora, which regulates vaginal pH in a range that’s inhospitable to sperm.

After positive late-stage clinical trials, Evofem in the second half of the year will ask for U.S. Food and Drug Administration approval.

In a deal that closed April 10, investor PDL BioPharma bought $30 million in Evofem stock, at $4.50 a share, a 26 percent premium on the prior day’s closing price. Evofem said a second tranche could provide up to $50 million, through PDL buying another $30 million in stock, and Woodford Investment Management and Invesco Asset Management each investing $10 million in stock.

"Successful completion of this financing should enable us to execute our strategy with confidence and to ensure the successful launch of Amphora in 2020 as a novel, hormone-free, woman-controlled contraceptive, if approved by the FDA," said Saundra Pelletier, CEO of Evofem, in a news release.

A separate amphora clinical trial is gauging whether it can prevent chlamydia and gonorrhea in women. Results from the phase 2b clinical trial are expected this fall.