Normal fetuses have bladders, regardless of whether they are male or female. A normal developing fetus, whether female or male, will later develop into an individual that contains all the normal organs of the body. A small percentage of fetuses with developmental abnormalities may not have a bladder, a condition that requires prompt prenatal diagnosis. The eighth week of gestation is the time when the structure of the major body organs completes its differentiation, and then each organ further develops and matures. In the gradual growth of the fetus to a certain period of time, the bladder can be seen under ultrasound, and the bladder can not be detected by means of examination within 8 weeks. If any abnormality is detected during the pregnancy checkup, it is recommended to go to the hospital in time and follow the doctor’s instructions for treatment.