I find the entire concept of krogan birth to be completely baffling. So a krogan female can have 1000 children in 1 year. My question to the developers and writers of mass effect is this: How?
Like, let me phrase it in simple terms. Rabbits **** like crazy and have tons of litters all the time, right? That's where the expression "**** like Rabbits" come from, cause they're constantly having sex and constantly reproducing, and no wonder when you're basically all of natures prey animal huh? Kinda like the krogan on tuchunka per-industrialization, right? Makes sense as well when you consider that krogan have eyes on the side of their heads, which indicates that the krogan were a prey-species and not a predator species on their homeworld.
Going back to rabbits, you'd figure rabbits must breed faster then krogan, after all they're a fraction of the size and live a fraction of the age.Everything in nature incentives rabbits to breed super crazy fast, and you need to get into insects and egg laying creatures to get the rates of birth higher then rabbits. Rabbits per litter have about 1 to 14 babies a litter, accounting for deformations or complications. Rabbit gestation lasts 28-31 days, and because they are induced ovulators, mother rabbits can be impregnated again within minutes of giving birth.
So, you basically have 1 pregnancy a month, and assuming each litter produces 14 healthy babies, you have 168 rabbits a year per 1 female. Even cranking that number up to 50 kids a litter, it's not enough to cover how fast krogan populate. Krogan would need to give birth to 83.3 baby krogan A MONTH, and do nothing else but get pregnant and give birth for a whole year, in order to reach the numbers talked about in the lore.
That's beyond ridiculous, especially when you consider that a rabbits lifespan is 9 years total, and the krogan live for hundreds. In my opinion, something doesn't add up to this equation. If there were only, like, 100,000 krogan before, and only like 5% of the whole population is female, that's still 5,000 females, all getting pregnant and giving birth to 5,000,000 children in 1 year. 5% of that population would be 250,000, and that would make a population of 250,000,000 by the end of that year. At least, I'm assuming krogan children develop at a super accelerated rate. Why else would it only take a month from conception to birth a fully formed live krogan baby, let alone 83 of them.
The krogan have the breeding of an animal and race that lives a fraction of the lifespan and is at least a 4th of the side. In other words, Vorcha. They breed in numbers more accurate to the Vorcha then to a long lived species whose lifespan can reach 1000 years. It would make more sense if there was a periodic period of breeding and non-breeding for a the krogan to ever develop any sort of logic, where once every 100 to 200 years krogan females enter a year-long mating season and have a crazy big litter, and then a long strech of no-mating occurs. Hell, that's how every large population creatures do their breeding on this world, say for most mammals.
Given the massive numbers we see presented in the lore, and no explination to assure us that krogan don't biologically develop at a super accelerated rate and aren't ready to reproduce by age 3, the Genophage is probably the best solution. Why it was selected to work by essentially late-term aborting 83 babies in the womb simultaneously, and not just make it hard for the sperm to fertilize the eggs, I don't know. Probably so that we'd have some lovely imagery to all that genocide going on.
All I can think of is the cleanup. What happens to the 999 baby corpses per female per year? In my opinion the salarians and turians should run the krogan organic waste treatment plants. They literally engineered this mess to happen, it's only fair they literally clean up the after math.