Dingle A, Schäferhoff M, Borghi J, et al. - The intent of this study was to describe Muskoka2 and present estimates of levels and trends in aid for RMNCH in 2002–17, with a focus on the latest estimates for 2017. Researchers used Muskoka2 to the Organisation for Economic Co-operation and Development's Creditor Reporting System (CRS) aid activities database to generate estimates of RMNCH disbursements in 2002–17. The study ascertained the percentage of disbursements that benefit RMNCH applying CRS purpose codes for all donors except Gavi, the Vaccine Alliance; the UN Population Fund; and UNICEF; for which fixed percentages of aid were considered to benefit RMNCH. It was demonstrated that Muskoka2 retains the speed, transparency, and donor buy-in of the G8's previous Muskoka approach and incorporates eight innovations to increase precision. The low-income and middle-income countries still experience substantial funding gaps and threats to future funding, although aid for RMNCH increased in 2017. Compared with reproductive health or child health, maternal and newborn health get considerably less funding, which is a persistent issue requiring urgent attention.