Obiscy

"If the moon of Obis has a gravitation force that is strong enough to move
the very oceans of Oryth, then it stands to reason that we, being 70% water,
can be affected by this force as well."

— Huzzle Bickman, Scholar of Oryth

Obiscy or the Obis Effect is an unproven correlation between the Obis cycle and the physiological changes and behavior of living beings on Oryth, including its sentient humanoid species. This subject has long been debated among the Scholars of Oryth as they are profound followers of the "Correlation is not Causation" mantra. There is much in support of this condition, however, and has deemed further study on the matter.

Fertility

It is widely agreed upon that Obis affects fertility due to the humanoid menstrual cycle, which averages 28 days. Even deities of fertility, such as Ehlonna or Myhriss have a frequent correlation with the moon's cycles in their rituals and practices. Many couples wanting to have a child will seek out a cleric of one of these patrons and will be encouraged to copulate under the light of the full moon. This is sometimes overseen by a priest of one of these orders who will perform a prayer to help sanctify the procreation of the two lovers.

Birth Rate

Some believe that the birth rate is accelerated during the full moon, however, the Scholars of Oryth have not found enough evidence to support these claims. There are some species, such as elves, that have shown an accelerated birth rate, but many of the other humanoid races such as humans, goblins, and orcs have no actual support through the numbers of births throughout the year.

It also could be that the elven number of births could be correlated to the infrequency of their procreation due to their elongated life-spans, with some elves living even as long as two millennia.