Baby dice
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Both Parents will roll the dice three times, a total of 6 Dice Rolls.
the overall even or odd majority of numbers [4 of 6] is the result. Even Rolls = Roll Again.
Ex:
2, 4, 5 + 6, 3, 4 [pregnant]
3, 6, 2 + 1, 3, 3 [not Pregnant]
4, 3, 2 + 2, 5, 3 [Roll again]
Pregnancy lasts as long as you like, with The bare minimum of a month. One week per trimester.