It will be determined on the basis of a one-time gene test.
The women's category at the Olympics will be limited to biological females from 2028.
Transgender women athletes have been banned from competing in all female events at the Olympics.
The IOC says eligibility will now be limited to biological females, determined on the basis of a one-time gene test.
No woman who transitioned from being born male competed at the 2024 Paris Summer Games.
The policy will come into force for the LA Games, with IOC president Kirsty Coventry saying the change has been led by medical experts.

Tuesday Morning Sports Update
All Ireland Football Championship Opening Round Fixtures Confirmed
Tommy O'Brien Among Injury Doubts For Leinster's Champion Cup Final On Saturday
Monday Morning Sports Update
Sunday Evening Sports Update
Mourinho's Benefica Go Unbeaten but Miss Title
Brave Kildare Fall Short in Leinster Ladies Final
Chelsea Appoint Xabi Alonso as New Manager