I joined yesterday and bred my first unicorn (#48585) - this was yesterday. I was going through my pets and it didn't list her as pregnant - and apparently I forgot that I had bred her. So I went and bred her again - not thinking anything of it. I went to her page after the fact and she now has a double pregnancy?? 

Father of Baby: Nameless (#34794)

Effects

Pregnancy: 7 hrs 52 mins  < first pregnancy -  IS by the male listed above. 
Pregnancy: 23 hrs 52 mins < second pregnancy is by this male: http://beastkeeper.com/pet/1744

Is this a bug or is my unicorn just magically capable of two different pregnancies at once? lol. Also - will both babies have their appropriate fathers or will they both just fall under 34794?

Thanks for reporting.

It's a bug. We added additional check for pregnancy which should prevent this in future. Your female will have twins, each baby is a unique pet with its own father.

Sorry for the confusion.

Thanks! :)

how long does the pregnancy last