Nine weeks pregnant with fetal buds and no fetal heart may be caused by short pregnancy time, embryonic arrest and other reasons. 1. Short duration of pregnancy: If the pregnant woman has irregular menstruation, there may be delayed menstruation, ovulation and fertilization, which makes the actual gestation week smaller than the time of menopause, resulting in the delayed development of the embryo with fetal buds but no fetal heart. 2. Embryonic arrest: If there are fetal buds but no fetal heart in the ninth week of pregnancy, it may be due to chromosomal abnormality of the embryo or abnormal quality of the embryo, and at the same time the human chorionic gonadotropin appears to be lowered, which may indicate that the development of the fetus has stopped, and measures should be taken in time to terminate the pregnancy. After pregnancy, we should make sure that there are yolk sacs, fetal buds and fetal heart development in the uterus before we can continue the pregnancy, and if it is determined that the fetus has stopped developing, we should take timely measures to terminate the pregnancy.