After careful questioning, it turned out that when the mother had an ultrasound at twelve weeks, the ultrasound indicated that the lower edge of the placenta completely covered the cervical opening, and when the doctor showed the report to the outpatient doctor, she was told that it was placenta praevia, and she needed to be put on absolute bed rest, could not work, could not go to work, and was even prescribed ” special medication” that “could make the placenta grow upwards”. The doctor told her that she had placenta previa, and that she needed absolute bed rest, could not work, could not go to work, and was even prescribed “special medicine” that “could make the placenta grow upward. At that moment, I felt that the world was too big for me and what I knew was too little, and I was ashamed of my twelve years of medical experience. I only know that textbooks say: placenta praevia, refers to 28 weeks of pregnancy, the lower edge of the placenta reaches or covers the cervical opening. There must be a reason for the textbook definition of placenta praevia. I have done a lot of ultrasound in recent years and have helped many pregnant mothers with continuous dynamic ultrasound to labor, but maybe we are overly worried. First, placenta praevia must not be diagnosed until 28 weeks, why? Because the position of the lower edge of the placenta and the relationship of the cervical opening will change before 28 weeks. 28 weeks before the position of the placenta completely covered or close to the endocervical opening can not be concluded that the placenta praevia. Secondly, is it normal for the ultrasound to indicate that the lower edge of the placenta is close to the cervical os during the nt period? My personal understanding, during pregnancy, no matter the fetus, placenta, amniotic fluid, uterus will undergo great changes, will gradually become larger, but the weight increase (weight at delivery minus non-pregnant weight) should be the smallest amount of the placenta, 12 weeks, although the placenta is not big, but this period of time the placenta occupies the largest area of the uterine cavity than the placenta, the placenta inevitably close to close to the cervical os, or completely cover the os, in my observation, 12 weeks, 20% are completely covered with the cervical os, in my observation, 12 weeks, the placental position is close to the os. In my observation, at 12 weeks, 20% of the placenta completely covered the endocervical os, 50% was close to or partially covered the endocervical os, and 30% was more than 2cm away. Therefore, low placenta position is very common at this time. Third, does low placenta position at 12 weeks mean placenta previa? No! As mentioned in the beginning, there are still 16 weeks to go before it changes, so there is absolutely no need to be too nervous. Fourthly, do I need to stay in bed to keep the baby in 12 weeks if I have a low placenta position? Although the low position of the placenta has a certain risk of bleeding, but only a few, this pregnancy week low position of the placenta accounted for 70%, the majority of people are low, so there is no need to stay in bed to keep the baby. Especially pregnant mothers without bleeding, history of miscarriage, etc., can live a normal life, just the best ban on sex, if there is bleeding should be clear at any time to the hospital (because there is still a possibility that the bleeding is not caused by the placenta). Fifth, this time I need to take special drugs to promote placental growth? I am not well educated, but I have not heard of or seen any specific medication that has been certified to promote placenta growth, and any medication may be futile. So, folks, low placenta position on 12 week ultrasound is so common that there is absolutely no need to stress out and live life boldly… bed rest to keep the baby in bed? This argument is long outdated! I remember the mom-to-be in the clinic told me, “Dr. Huang, you know what? I’ve been in bed for two months, eating and drinking in bed. Obstetrics has progressed because we have dared to overturn the so-called gold standard of our ancestors. It’s time to say “NO” to traditional obstetrics.