Very interesting article:
Anna had given live birth via parthenogenesis (was proven by Dna test)
"Before aquarium staff could be absolutely sure that Anna had experienced parthenogenesis, they had to double-check that the other snakes in Anna's enclosure were, in fact, female. The animals were. Then, the staff ran DNA tests for the new snake babies. The new snakes were 100% Anna"
https://www.livescience.com/65632-an...gin-birth.html