12 weeks does not show pregnancy may be physiological phenomenon, fetal arrest and other reasons.
1. Physiological phenomenon: as the pregnancy progresses, the enlarged uterus will make the pregnant woman’s abdomen bulge, and gradually can be seen from the appearance of pregnancy.
The bottom of the uterus in the 12th week of pregnancy in the pubic symphysis 2 ~ 3 horizontal finger, the body type of thin pregnant women may be pregnant, but for obese pregnant women may not be pregnant, but when the ultrasound suggests that the development of the fetus is normal, it is a normal physiological phenomenon.
2. Fetal termination: When the fetus is terminated at 12 weeks of pregnancy, it will also be manifested as not showing pregnancy, and there will also be the sudden disappearance of breast swelling and pain and other symptoms, which can be clearly diagnosed through ultrasound, and it is necessary to comply with the medical advice to terminate the pregnancy in a timely manner.
If you are not pregnant at 12 weeks, you can go to the hospital to find out the cause and actively deal with it.