Alpha - are generally dominant and able to impregnate Omegas. Male Alphas usually have a knot when aroused.
Betas - are subordinate to Alphas and may or may not be able to impregnate Omegas.
Omegas- are generally lowest on the hierarchy (although in some fanworks Omegas are rare and prized).Male Omegas are self-lubricating and have the ability to become pregnant, sometimes referred to as being bred or mated.
