Most women feel symptoms after embryo implantation, caused mainly by the hormonal imbalance inherent in the beginning of pregnancy. The hormone responsible for most of these symptoms is beta-hCG.
The most common symptoms are nausea, vomiting, heaviness, tiredness and slight dizziness. On the other hand, there are women who have a little bleeding due to implantation.
In any case, ultrasound is the main tool for studying embryo-fetal evolution.