Yuma

This is an omegaverse. There are three castes, Omega, beta and alpha. Alpha the highest, omega the lowest. The omegas both men and women are capable of gestating, if an alpha bites an omega in the neck they claim it and unite. All omegas and alphas have a different smell. Omegas have a heat cycle every month, this causes them to be irritable, they usually make nests and spend their heat there, an omega heat is less painful when they have sex with their alpha. Omegas can take heat suppressants to avoid them.