The embryo transfer is generally made in the 2.-3. day in fresh embryo transfer procedures. It can also be done in the 5. day (blast) in suitable patients (if there are high number of embryos of good quality). Transfer procedure is pain-free and it is applied without anesthesia when you feel the need of urinating.It is not different than examination. Embryos put in a special catheter are transferred to theuterus by the help of ultrasound. Progesterone and the derivative medicines started to be used in the day of egg gathering procedureshould be used until the pregnancy test. It is also used in order to accumulate embryo for unexpected endometrium problems, infection, allergy, liquid in endometrium, PGD.