Patient's question:
What is the normal distance from the lower margin of the placenta to the internal cervical os in centimeters? Is a distance of 1.6 centimeters considered placenta previa?Doctor's answer:
The normal position of the placenta should be at least 2 centimeters away from the internal cervical os. As the gestational age increases, the placenta gradually moves upward and is generally fixed by the 28th week of pregnancy. A placenta distance of 1.6 centimeters from the cervical os can only be diagnosed as a low-lying placenta. Currently, around the 14th week of pregnancy, it is recommended to undergo regular follow-up ultrasounds. If vaginal bleeding or other symptoms occur, it is important to seek medical attention promptly.