>The length of pregnancy in the rabbit is 31 days and the doe can produce from 1 to 12 young each time she gives birth. She can become pregnant again within a few days of giving birth. However it is not good practice to allow the doe to become pregnant straight after giving birth. It is better to mate the doe when her young (litter) are 4 weeks old so that they are 8 weeks old when the next litter is born. In this way one doe can produce 6 litters a year.
Given she looks about to give birth any moment and is only now bringing it up definitely supports the 31 days part.
I can't help but see skull enema and I wonder how that works.
Well, seeing as a human rectum can stretch far enough to accomodate at least one racoon, it'll probably be something a lot like that. Though with a whole lot less fur and angry wiggling.
She is a white snake girl, based on a recurring theme in Japanese folklore rather than any particular species. White snakes are commonly believed to bring good luck, so in other words, she's introducing good luck for the year of the snake.