Cats may have factors during pregnancy that delay their birth. One possible reason is that your cat is in poor physical health. If your cat is not healthy, it may have a negative impact on their fertility. Another possible reason is that the cat's internal organs are damaged, leading to fertility difficulties. There are other factors that may also cause delays in cat birth, such as poor diet, excessive stress, environmental pollution, etc.
If your cat is pregnant for a long time without giving birth, it is recommended that you take it to the doctor as soon as possible to ensure its health. Get appropriate treatment. The doctor will conduct a detailed examination of the cat and give corresponding suggestions based on the situation.