30 days after the transfer only yolk sac without fetal buds and fetal heart, you can observe first, and review after a week.
The transferred embryo is usually a fertilized egg culture 3 days of cleavage embryo or about 5 days of blastocyst, 30 days of transfer is equivalent to the level of natural pregnancy 6~7 weeks of gestation, most of the pregnant women can see the fetal buds, fetal heart, but it is not absolute, some of the embryos are slow to develop, and may be delayed for 7 days for rechecking before they can be seen.
More than 8 weeks of pregnancy and no fetal heart buds, to consider the fetal arrest, may be the quality of the embryo is not well developed, the embryo chromosomal abnormalities caused by an abnormal pregnancy, diagnosis should be timely through the removal of uterus surgery to deal with clean.
After the implantation surgery, women should relax and have regular checkups. If there is any abnormality, it is necessary to consult a doctor to decide on the next step after the doctor’s assessment.