How long is gestation period of freshwater stingrays?

The gestation period of freshwater stingrays varies depending on the species. For example, the gestation period of the Amazon river stingray (Potamotrygon motoro) is approximately 4-6 months, while that of the bullseye river stingray (Potamotrygon orbignyi) is approximately 7-9 months. It's worth noting that these are approximate ranges, and the actual gestation period may vary among individuals within a species and may be influenced by environmental factors.