It is normal to have no fetal heart and fetal bud on 50 days of pregnancy. The fetal bud is formed around 40-50 days of embryonic development, and the fetal heart is formed on 50-60 days, after which the fetal organs gradually develop and take shape. Generally, you should go to the hospital for an ultrasound examination 50 days after the cessation of menstruation. If menstruation is regular, the fetal heartbeat and fetal buds can be seen and the pulsation of the primitive fetal heart tube can be detected. If the menstruation is abnormal before the pregnancy, such as a long period of menopause and a short period of fertilization and pregnancy, the embryo may develop for a shorter period of time, which may also result in not seeing the fetal heartbeat and fetal bud, you can wait for another week or so to go to the hospital for a follow-up examination. If the fetal heartbeat and fetal bud are still not detected after one week, it is considered that the fetus may have abnormal development, which is suspected to be caused by external factors such as low placental position or maternal endocrine disorder. If the failure to detect fetal heartbeat and fetal bud is caused by abnormal fetal development, you should consult the obstetrics and gynecology department of the hospital in time to determine whether to keep the fetus or terminate the pregnancy under the guidance of the doctor.