In order to understand the rest if the story we must first understand the omega verse...

What is Omegaverse?

Omegaverse is a AU(alternate universe) in which males can get pregnant. It isn't always the most popular AU, but it is still used by others. In this system, there are three main roles: Alpha, Beta, and Omega.

How do you know which you are?

First, at birth, the doctors will announce the gender(male or female). In some verses, you can pay to have a test done to determine whether the baby is an Alpha, Beta, or Omega. In others, you just have to wait until they are about 12-24 years old to find this out. So in a way, you have two genders. The male/female gender and the Alpha, Beta, Omega gender.

What do the three roles do?

Alpha

The Alphas are the more aggressive ones out of everyone. They are the larger and stronger ones, the dominant ones in bed. They are the males or females pumped full of testosterone. 

Betas

Betas are the normal, everyday guy. They can still breed with other Betas, but they cannot breed with Omegas or get them pregnant. With a female and male Beta, they can reproduce that way. Sometimes even a female Alpha and a female Beta would be able to reproduce.

Omegas

Omegas are the softer and more gentle of these roles. They are the nurturing parents who raise their children and they are the only ones in here who can get pregnant besides Beta females.

All Omegas go through heats, it all depends on the author how often they go into heats. In this story, the heat happens once a month

What is a heat?

A heat is the time when the Omega is most fertile and ready to mate, or just hide away until the heat is over.

If they have an Alpha mate, they will never leave their side unless they need to get their food or water. Mainly, they have sex and then rest. They keep a watchful eye over their Omega, listening to them and caring for them. But in bed, they still are the dominant ones.

If an Omega has no mate, it could be dangerous to even leave the house. They could get raped and forced into all of this, even if they protest and try to run. So they basically become avoidant to protect themselves

A good part about this heat is that the Omega will self-lubricate, which means they only need to prep the Omega a bit more have sex. During these heats, the hormones in an Omega go all crazy.

A strong scent is released during the heats, causing the Alphas to smell it and chase after the Omega. If there is already an Alpha with that Omega, he/she will fight the other Alphas off or bite the Omegas neck to release a hormone that causes the Omegas pheromones to change and have an effect only on them.

In some verses, there are pills to stop the heats from happening and some verses have washes that help cover the scent up. In this story, we have pills called suppressants 

How does pregnancy work?

Pregnancy is about the same as in the real world. For Betas at least. For the Omegas, everything sort of changes and flips their world around especially one who has never had a child before. The male Omegas chest will grow to around an a-cup to help feed their child. The Omegas will most likely be happy about having a child. The Alpha will become more and more protective of not just their Omega but also the small child growing inside of the Omega.

How does birth work?

For female Omegas and Betas, it works just as real life should. For male Omegas is where it gets complicated. Since their uterus is not in the normal position, there will most likely be a c-section, or Cesarean section. Basically they cut their body open and go into the womb, pulling the baby out that way. There are anesthetics that can be used to help numb the pain.

What is a nest?

A nest is usually a place where an Omega can be comfortable, whether if he is in heat or just having a bad day. It can be a closet or a couch, a small room or a bed. It will usually be filled with soft things, the most smelling like his/her mate if they have one. It usually makes them feel comfortable at all times, even if they feel they are about to murder someone. With Omegas being the small fragile creatures they are, it can help them rest. As they get closer to their delivery date, they will most likely spend more and more time in their nest with their Alpha.

A pheromone is a scent usually sweet smelling and very seductive