Determination of gestational weeks

The judgment of the number of weeks of pregnancy is a method of judging the number of weeks of pregnancy in pregnant women by data such as the time of the last menstrual period of the pregnant woman and the size of the uterus. The pregnant woman lies flat on the examination table, and the doctor uses a soft ruler to measure the length from the lower abdomen pubic symphysis to the uterine fundus. The number of weeks of pregnancy based on the time of the last menstrual period of the pregnant woman does not match the development of the uterus of the pregnant woman. Basic Information Specialist classification: maternity check check classification: physical examination Applicable gender: whether women are fasting: not fasting Tips: Before inspection: Do not wear corsets or tight clothes. Normal value Judgment of the number of weeks of pregnancy: 4 weekends: The size of the uterus is like a duck egg, and the bottom of the palace becomes round. 8 weekends: The uterus is a big fist, and the upper edge of the pubic symphysis can touch the bottom of the palace. 12 weekends: 2 to 3 horizontal fingers on the upper edge of the pubic symphysis. 16th weekend: between the end of the palace and the umbilical shame. At the end of the 20th week: the bottom of the palace reached 1 horizontal finger under the umbilicus, and the height was about 18 (15.3-21.4) cm. At the end of the 24th week, the uterus reached a horizontal finger on the umbilicus, and the height was about 24 (22.0 to 25.1) cm. At the end of the 28th week: the bottom of the palace reached 3 horizontal fingers on the umbilicus, and the height was about 26 (22.4 to 29.0) cm. Week 32: The bottom of the palace is between the umbilicus and the xiphoid process, about 29 (25.3 to 32.0) cm high. At the end of the 36th week, the bottom of the palace is 2 horizontally pointed under the xiphoid process, and the height is about 32 (29.8~34.5) cm. Week 40: The bottom of the palace is slightly higher between the umbilicus and the xiphoid, and the height is about 33 (30.0 to 35.3) cm. Clinical significance Abnormal results: The number of weeks of pregnancy based on the time of the last menstrual period of the pregnant woman does not match the development of the uterus of the pregnant woman. Need to check the population of pregnant women. High results may be diseases: premature birth considerations Before the test: Do not wear a tight-fitting or tight-fitting dress. When checking: Relax your body and actively cooperate with your doctor. Inspection process The pregnant woman lies flat on the examination table, and the doctor uses a soft ruler to measure the length from the lower abdomen pubic symphysis to the uterine fundus. Not suitable for the crowd Inappropriate crowd: No.