It was actually much easier than what I initially believed, each facility is increasing the annual reproduction rate of the planet by X% and that is basically all. (A planet with a reproduction rate of 10% means 15% with the best facility for example)
However, isn't Reproduction too cheap to buy then? You only need 1000 points for having 110 in your Reproduction ability, which means a +10% increase of your reproduction rates. That is twice as efficient as the Organic facilities, and you do not even need to do researches or to build facilities. (On the other hand, every point after 110 costs 200 points, and this cost seems fine for me)
You will lack the Replicant Center though, which gives an additional million of settlers each turn, so perhaps this lack balances everything? (I have to admit I do not really find this facility useful, so I cannot speak about it.
)
Finally, some values for the reproduction increases are lacking in the descriptions. (Mainly the cities, Cultural Centers, that is to say the Colonial Settlements, and the Replicant Centers) The problem being when you are wondering if you should build this Gestation Vat or no, as you don't know how efficient your Homeworld is for increasing the reproduction rate. If you want, I will give you the list of such facilities and the values for them.
