“Before the founding of the Caliphate and the creation of Womb Banks, the ysleria of old were carrying their young on - and in - their backs, where seedlings would erupt from cluster pods after “pregnancy”.
After Zéphyr ascended as Caliph, the rules of pregnancy changed (somehow) and caused a biological upheaval (one might call it aberration), as litters are now grown in the abdominal region...for the most part.
Apart from said Banks and “natural” southern pregnancies, somehow, the roaming Bédouin are still unaffected by this change and keep on producing their offspring the old-fashioned way.”
Albe Ombrelune, Al-Katib Al-Awwal