Fetal buds are embryos that can be detected by ultrasound until roughly 2 months or 56 days into the pregnancy. 48 days of pregnancy with no buds but no other discomforts are considered normal, and it is recommended to check back in 1-2 weeks. Most pregnant women can detect fetal buds by examination around 6-7 weeks or 42-49 days of pregnancy. Fetal buds are a stage of fetal growth and development, and can develop organs and limbs at a later stage, etc. If there are fetal buds detected, it indicates a normal intrauterine pregnancy. The absence of fetal buds on the 48th day of pregnancy is not an abnormal phenomenon, because the time of the emergence of fetal buds is not fixed, some pregnant women have delayed menstruation, ovulation is also delayed, sperm implantation time will be late, and the formation of fetal buds will not be early, and some groups of people even more than 50 days before the discovery of fetal buds. At this time, if the pregnant woman has no other discomfort, just wait patiently, 1-2 weeks after the review can be. Of course, the examination should also pay attention to some relevant indicators, such as progesterone, blood sugar, HCG, etc., to rule out other abnormalities. If fetal buds are not detected after 60 days, there may be abnormal embryonic development or even sterilizations, placental abnormalities, uterine dysplasia, ectopic pregnancy, etc., and medical treatment should be sought as soon as possible.