evaluation of results of frozen embryo replacement cycles based on spinnbarkeit and endometrial thickness

Background objective: frozen embryo replacement (fer) cycle is a procedure that assists in, in vitro fertilization (ivf) outcome by using the storage and transfer of excess embryos. this study evaluated the success of fer using spinnbarkeit and endometrial thickness.materials methods: this cross-sectional study was performed on 97 infertile women at the imam khomeini hospital of ahvaz, from march 2019 to march 2020. endometrium was prepared with estradiol valerate from the third day of menstruation and followed by serial vaginal ultrasound till the thickness of the endometrium attained seven millimeters to eight millimeters. the cervical secretions were collected from the external os and were estimated based on centimeters. also, endometrial thickness was recorded.results: no substantial difference between endometrial thickness and spinnbarkeit in the fer cycles with pregnancy outcomes was observed (p>0.05).conclusion: some variables such as endometrial thickness, spinnbarkiet, estradiol dose intake, and quality of embryos have no relationship with the success of fer cycles.