You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Nitabuch's membrane is absent in: and explain in detail?
Ans. (a) Placenta accretaRef: Williams obstetrics 23rded, Ch 35.* The nitabuch layer is a zone of fibrinoid degeneration in which invading trophoblasts meet the decidua. If the decidua is defective, as in placenta accreta, the Nitabuch layer is usually absent.Also Know* Placenta accreta indicates that villi are attached to the myometrium.* Placenta increta, villi actually invade the myometrium.* Placenta percreta defines villi that penetrate through the myometrium and to or through the serosa.