ET is the final and most crucial step of IVF treatment and pregnancy rates after ET may be affected by various factors. In a Cochrane meta-analysis (Derks et al., 2009), no evidence of a benefit was found for performing ET with a full bladder, the removal of cervical mucus, and flushing the endocervical canal or the endometrial cavity. No data were found on changing the woman's position, the use of a tenaculum, the performance of a dummy transfer, and embryo afterloading. Other meta-analyses demonstrate that the use of soft ET catheters (Buckett, 2008) and transabdominal ultrasound guidance (Brown et al., 2010) lead to a higher chance of clinical pregnancy when compared with the use of stiff catheters and clinical touch respectively.