english: In these species, the sex of the baby is not yet determined when the egg is laid, and it remains undetermined until sometime in the middle of the overall development period, when a critical time is reached.
non_english: Kod ovih vrsta, pol bebe nije određen onda kada se jaje položi, i ostaje neodređen do nekog trenutka na sredini razvojnog perioda, kada se dosegne kritično vreme.