When you pull an egg, it will do one of two things:
A) cause a wave (unannounced)
or
B) cause a swarm (announced)

Each egg pulled has a random chance to be the swarm cause.

Here's how that breaks down:
8 eggs = 3 swarms
6 eggs = 2 swarms
4 eggs = 1 swarms
2 eggs = 1 swarm (deep dives will have 2 egg missions)

Knowing the amount of swarms for the mission can be beneficial because you can plan:
- a good room to deal w/ potential swarm
- know when to group up, if your team is split across the map

Let me give a potential scenario:
Its a six egg mission. We know that we will get exactly 2 swarms in a 6 egg mission.
You pull egg #1. No swarm, just a wave.
5 eggs left.
You pull egg #2. No swarm, just a wave.
We know at this point, since no swarm has happened:
4 eggs are left, so that's a 50% chance to be a swarm on next pull.

This is the time to start thinking about things like, is your team grouped up? does everyone have ammo?

See next section for more details on that line of thinking.

So you pull egg #3. Its a swarm. You deal w/ it.
That's 1 of the 2 swarms you know you will get.
3 eggs are left.
We know its a 1/3 chance for a swarm.
You pull egg #4. No swarm, its just a wave.
2 eggs left.
This means next egg pulled has a 50/50 chance of being the last swarm..

See the line of thinking?
;)

• Don't pull another egg until the wave or swarm is finished. (unless the host of your game is ok with it. There are some schools of thought to pull all the eggs and the spawns will cap out and you fight less is the idea.. that is rare thinking.. some big time full of themself players will want to do this though)
  
• Type into chat a "rdy for egg?" and pull out your laser pointer so you can see how much health and ammo your team has before you pull one. Here's why:
  - Your engineer may not have their turret setup (and if they run double turret, its even worse if you pull w/o doing a simple check w/ your team)
  - Another teammate may be on the other side of the map, about to pull an egg and you could potentially double pull. (worse case scenario is 2 swarms happen, and low and behold, you may screw over your teammates that are not with you as they get tons of enemies dumped on them)
  - Your teammates may need ammo, maybe its a good time to get more nitra and regroup for a resupply -- this also fixes any low health if there is no red sugar around.