US Fertility is the nation’s largest partnership of physician-owned and physician-led fertility practices, providing a comprehensive suite of assisted reproductive technology services – including in vitro fertilization (IVF), intrauterine insemination (IUI), genetic testing, and tissue storage – alongside a growing set of ancillary offerings that support patients across the full fertility journey. Built on a foundation of clinical excellence and leadership in reproductive research, the company operates a national network of more than 200 physicians across 160+ clinics / labs. TPO invested alongside Amulet Capital Partners in its continuation vehicle for US Fertility, led by StepStone Group.