World Athletics said it was now working to put in place the testing with the timeline to be agreed “over the next few weeks”.
The test will look for the SRY gene which is part of the Y chromosome and causes male characteristics to develop.
A cheek swab test will determine if SRY is present, while a dried blood spot test could also be used to determine an athlete’s testosterone levels.
World Athletics said the test was “a highly accurate proxy for biological sex” that would need to be taken just once by an athlete during their career.
During a consultation, the majority of stakeholders “agreed that allowing only biological female athletes to compete in the female category was essential to maintaining fairness”, according to World Athletics.
Two years ago, World Athletics banned transgender athletes who had gone through male puberty from competing in the female category in international competition.
Last month, its working group recommended further steps.
This was on the basis of fresh evidence which it said showed there was a “significant performance gap before the onset of puberty”.
In addition, World Athletics will also merge regulations for both DSD and transgender athletes after the working group said new evidence showed testosterone suppression “can only ever partly mitigate the overall male advantage in the sport of athletics”.
The current rules for DSD athletes required them to reduce their testosterone levels to a set level for at least six months to compete in any female category event internationally.
