loss of memory due to the passage of time during which the memory trace is not used
Memory errors Transience refers to forgetting what occurs with the passage of time.[3] Transience occurs during the storage phase of memory, after an experience has been encoded and before it is retrieved.[3] As time passes, the quality of our memory also changes, deteriorating from specific to more general.[3] German philosopher named Hermann Ebbinghaus decided to measure his own memory for lists of nonsense syllables at various times after studying them. He decided to draw out a curve of his forgetting pattern over time. He realized that there is a rapid drop-off in retention during the first tests and there is a slower rate of forgetting later on.[3] Therefore, transience denotes the gradual change of a specific knowledge or idea into more general memories.[4]
Prenatal memory There is some evidence that fetal memory may begin within the second trimester after conception. Substantial evidence for fetal memories has been found at around 30 weeks after conception.[1] Fetal memory is important for parental recognition, and facilitates the bond between child and parents. One of the most important types of memory is that which stores information contributing to the maternal bond between infant and mother. This form of memory is important for a type of development known as attachment.[2] Fetal memory is thus critical to the survival of the fetus both prenatally (in the womb) and after birth as an infant.