10 weeks pregnant chest become soft not bloated may be a physiological phenomenon, or the occurrence of fetal arrest, preeclampsia. 1. Physiological phenomenon: 10 weeks pregnant is the end of early pregnancy, at this time the chest becomes soft and not distended may be the early pregnancy reaction gradually reduce the performance, belong to the normal physiological phenomenon. General early pregnancy reaction in pregnancy around 3 months gradually reduce to disappear, but due to each pregnant woman’s physique is different, so there may be an early situation. 2. Fetal arrest: the causes of this disease include chromosomal abnormalities of the embryo, pathogenic microbial infections, impaired maternal immune status, uterine malformations, polycystic ovary syndrome, bad habits, decreased sperm quality, and the age of the pregnant woman. Common symptoms include breast swelling and pain and gastrointestinal discomfort is reduced, so there will be 10 weeks pregnant breasts become soft and not bloated. 3. Pre-eclampsia: This disease occurs in relation to sperm deformities, exposure to radiation, strong stress stimuli, endocrine abnormalities, genital abnormalities, chromosomal abnormalities of the embryo and so on. Factors such as age over 35, history of miscarriage, underweight or overweight increase the risk of miscarriage. There is often a disappearance of early pregnancy reaction, which can be manifested as 10 weeks pregnant breasts become soft and not bloated. It is recommended that pregnant women whose breasts have become soft and not swollen at 10 weeks of pregnancy go to the hospital in time, and cooperate with the doctor to carry out a series of relevant examinations to clarify the specific causes.