This site will share with you what we’ve learned about how to induce turtles to lay their eggs if they have been unable to oviposit because of disease, malnutrition or environmental circumstances. We have developed pharmaceutical methods using prostaglandins and alpha-agonists to induce turtles that, when combined with some other simple, physical techniques, are greatly superior to the old method of using oxytocin. If you just want to know how we do it go right to the section labeled “PIM instructional.” If you’re interested in how we developed these recommendations you can find the details in the “Primary data” section.
The prostaglandin induction method (PIM) instructional. Learn how to do it now.
In a captive situation it can sometimes be very difficult to get turtles to lay their eggs naturally. The female will often choose to retain the eggs if the soil required to dig her nest is not just right. To be “just right” the soil has to be the correct consistency, temperature, and have the right odor and moisture levels. Sometimes turtles will chose to only lay their eggs in the shade, full sun or under structures like plants or fallen wood, so the best conditions can be difficult to provide in captivity.
This paper was published in 2007; before we began our research at the Concordia Turtle Farm. Because of this the procedures and induction methods we used prior to 2007 have been replaced by the evidence based procedures and induction methods we developed during the years at the farm using controlled trials and empirical data.
The review of the physiology of oviposition is still accurate.
From 1978 to 2006, oviposition was induced in 13 North American turtle species. Of the 245 inductions, 195 involved the use of oxytocin alone, 22 used arginine vasotocin (AVT) alone, 13 used a combination of oxytocin and ketamine, eight combined propranolol and oxytocin, and seven propranolol and AVT. The relative viability of Chrysemys picta picta eggs obtained from natural nests and via oxytocin induction was also evaluated. The oxytocin induced eggs were as viable as natural nest eggs. Suggested dosage ranges for oxytocin used alone vary from 0.7-4.0 units per 100 grams depending on species.
