The medication administered for the preparation of the endometrium is hormonal and, therefore, the symptoms or effects it may cause are related to abdominal swelling, fluid retention, tiredness, etc.
In any case, they are not serious or intense symptoms. In fact, many women do not notice changes during endometrial preparation treatment.
Read the full article on: Endometrium Preparation for Embryo Transfer: How does it work? ( 66).