Here’s an explanation from Wikipedia without being forced to watch an hour-long video.
Works in the Omegaverse genre typically depict characters as possessing two sexes: a primary sex (male or female) determined by their external sexual organs, and a secondary sex that manifests during puberty, determined by their internal reproductive system.
Between Alphas and Betas, only females can carry on a pregnancy, but male Omegas are often envisaged as being able to become pregnant via a uterus connected to the rectum, and Alphas can impregnate regardless of their main gender.
Can you explain?
Here’s an explanation from Wikipedia without being forced to watch an hour-long video.
Link
Thank you, informative internet stranger.
So they’re intersex.
https://youtu.be/zhWWcWtAUoY