sentences:  The scientists began preparing to mate the two once again in May 2009, which fell within this species' breeding season, but in the fall of 2009, the zoo announced that despite laying 188 eggs, the eggs were infertile and would not hatch.The Turtle Survival Alliance issued a statement explaining the infertility was due in part to the turtle's poor diet and the group expressed concern that the zoo's patrons had thrown trash into the turtle's enclosure that, if eaten, could endanger the health of the turtles.On June 15, 2010, the female laid a total of 63 eggs.