Background: Infertility is defined as not conceiving after one year of unprotected sex. Apart from age, physical and hormonal misbalance, and lifestyle or environmental factors for infertility; Endometrial thickness has an important role in conception. Females with the 8-12mm endometrial thickness in the late proliferative phase had great chances to get conceive.

Aim: To determine the sonographic diagnostic features of the endometriumthickness with Transvaginal high-resolution ultrasound are predictive of infertility.

Methods: An electronic database search was performed (Google Scholar, Science Direct, and PubMed) with the data range from 1988 to 2020.All studies, fully-available in English, assessing the endometrial thickness in the gray-scale image on TAS/TVs.

Results: Thirty-three articles were found, we evaluated the performance of ultrasound diagnostic techniques, for the measurement of endometrial thickness, our results showed that ultrasound had a high level of diagnostic capability for measuring endometrial thickness. If endometrial thickness is more than 14mm or less than 7mm then chances of pregnancy were zero, so high chances of pregnancy when the endometrial thickness is 8mm to 11mm.

Conclusion: We concluded that when the endometrial thickness was increased from 8 mm to 11 mm the chances of pregnancy were maximum, and when the thickness of endometrium was more than 14 mm or, less than 7 mm the pregnancy ratio was almost zero. Transvaginal ultrasound is an excellent imaging modality and its sensitivity is high for the measurement of endometrial thickness

Keyword: Transvaginal sonography, endometrial thickness, Infertility