👉 A nosarian is a type of pregnancy that occurs when the cervix (the opening in the uterus) becomes too narrow or blocked, preventing its normal flow and delivery. This can occur during various stages of pregnancy, but it's most common in early pregnancies. During a normal pregnancy, the cervix opens to allow for easier passage of the baby through the womb. If this process is disrupted at any point, such as when the cervix becomes too narrow or blocked, it can lead to complications