The gestational sac of 22 * 12 * 16 did not see obvious fetal heart buds recommended dynamic observation, continued for two weeks without seeing fetal heart buds is generally considered to be embryonic anaesthesia, the need for timely removal of the uterus. The size of the gestational sac is 22*12*16mm generally consider 6-7 weeks pregnant, most pregnant women at this time ultrasound can detect fetal heart, fetal buds, yolk sac and other tissues, if you do not see obvious fetal heart buds, it is recommended to continue to observe for two weeks, more than two weeks or more still did not see the fetal heart buds are generally considered embryonic sterilizations, the need to remove the uterus as soon as possible, the termination of pregnancy. Embryonic failure and empty sac, chromosomal abnormality and other factors are related to the occurrence of embryonic failure should be terminated as soon as possible, to reduce the harm caused to the pregnant woman.