Final answer:
Placenta accreta is a condition where the placenta invades the myometrium and doesn't easily separate. It can lead to severe bleeding and other complications.
Step-by-step explanation:
Placenta accreta is the condition when the placenta invades the myometrium (the muscular layer of the uterus) and doesn't easily separate. It occurs when the placenta attaches too deeply to the uterine wall, making it difficult to remove after childbirth. Placenta accreta can lead to severe bleeding and other complications.