Bonnier has returned to back the fertility tracking app developer's series B round, the proceeds of which will fund international growth.

Bonnier Growth Media, the corporate venturing arm of media conglomerate Bonnier, has participated in a $30m series B round for Sweden-based fertility tracking app developer Natural Cycles.

Venture capital firm EQT Ventures led the round with contributions from Sunstone Capital and E.ventures. Bonnier, Sunstone and E.ventures had previously funded Natural Cycles’ $5.9m series A round in June 2016.

Natural Cycles has developed an app that tracks a woman’s fertility as a method of contraception. It requires users to measure and…