The Relationship Between Endometrial Thickness and Endometrial Pattern With Pregnancy Rate Based on Positive Serum Beta-Human Chorionic Gonadotropin

Infertility is defined as the lack of pregnancy after one year of sexual contact without using any contraception. The aim of this study was to investigate the association between endometrial thickness (ET) and endometrial pattern with beta-human chorionic gonadotropin (B-HCG) test in women undergoing the induction of ovulation who referred to the infertility clinic of Ali ibn-e Abitalib hospital in Zahedan. This cross-sectional study was conducted at Ali ibn-e Abitaleb hospital in Zahedan (Iran) in 2017. The ET and endometrial pattern were estimated using transvaginal sonography and the pregnancy rate was determined based on B-HCG test. Finally, the data were analyzed by SPSS using the Chi-square test and independent t-test. A total of 200 individuals with a mean age of 29.6 ± 5.6 years were evaluated in this study. The negative or positive B-HCG distribution was significantly different in terms of the endometrial pattern (P=0.001) so that 35.3% of women had B-HCG positive cases in the three-line pattern of ET while in the homogenous pattern, 3.3% had B-HCG positive cases. In addition, the pregnancy rate in women with ET greater than 7 mm was significantly higher compared to those women with ET less than 7 mm thickness (35.1% vs. 12.8%, P<0.001). Overall, the results of this study showed a significant correlation between the endometrial pattern and ET and pregnancy rate based on positive B-HCG test.