# Conception Probability

Probability is calculated on the ovum rather than the individual; meaning that an individual may potentially be a surrogate mother of a different species, the compatibility is calculated against the ovum to host and the ovum to breeder combined.

The maximum compatible probability is 100%; there are currently no boosters. The order in which probability is calculated and how is as follows, and stacks with each layer: (i.e. calculation for each of the numbered items below (except #4) if the values were 50%, 90%, 150% respectively; the total compatible probability of conception would be the base of **100%** multiplied by 50% \* 90% \* 150% = 67.5% total probability)

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Ovum source that is not from the same individual currently hosting the ovum, probability is calculated against the compatibility between species of the ovum and the host; if the species are the same, there would be no variation. 

(Includes a partnered compatibility boost and any permanently forced and transiently forced compatibility at the time the ovum was generated)
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Ovum species is calculated against the individual species that is breeding. 

(Includes a partnered compatibility boost and any permanently forced and transiently forced compatibility at the time the ovum was generated)
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Sum of essence transferred by the breeder over a 5 day period is divided by the total amount of essence the uterus is holding and by the amount that particular species uterus expects (different species have smaller/larger uteruses). 

(This is the only compatibility calculation which allows a boost up to 200% to offset the previously calculated value; meaning more essence transferred, greater the probability)
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<table data-full-width="true"><thead><tr><th>Your Total Essence</th><th>Uterus Total Essence</th><th>Uterus Expect Essence</th><th>Efficacy Percent</th><th>Conception Probability</th></tr></thead><tbody><tr><td>15 ML</td><td>15 ML</td><td>30 ML</td><td>100 %</td><td>50 %</td></tr><tr><td>15 ML</td><td>20 ML</td><td>30 ML</td><td>75 %</td><td>38 %</td></tr><tr><td>45 ML</td><td>45 ML</td><td>30 ML</td><td>100 %</td><td>150 %</td></tr><tr><td>45 ML</td><td>60 ML</td><td>30 ML</td><td>75 %</td><td>113 %</td></tr></tbody></table>

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If probability is great enough for conception, the same probability value is checked against any potential hybrids that may be conceived between the two species (ovum and breeder); otherwise, the species will remain that of the ovum source species.
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