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[Using ultrasound imaging in implantation].
V B Damon1, K Bessai, J Gregor
1Centre de médecine de la reproduction, Clinique Montplaisir, Lyon, France.
Zentralblatt Fur Gynakologie
|August 8, 2001
Summary
Sonography, using ultrasound and Doppler, assesses endometrial thickness, structure, and uterine blood flow to predict preimplantation success. Optimal conditions include specific endometrial characteristics and vascularization patterns for successful pregnancy.
Area of Science:
- Reproductive Medicine
- Medical Imaging
- Gynecology
Background:
- Sonography is a key clinical tool for evaluating preimplantation prognosis.
- It assesses both morphological (endometrial) and functional (uterine vascularization) parameters.
Purpose of the Study:
- To evaluate the prognostic value of sonographic parameters for preimplantation success.
- To determine optimal sonographic criteria for successful embryo implantation.
Main Methods:
- Bidimensional sonography for endometrial thickness and structure assessment.
- Doppler sonography to evaluate uterine vascularization, including pulsatility index (PI) and sub-endometrial flow.
- Analysis of correlations between sonographic findings and pregnancy rates.
Main Results:
- Endometrial thickness above 6-8 mm is necessary for pregnancy.
- Hypoechogenic endometrium with 5 layers is a positive prognostic factor.
- Pregnancy rates decrease significantly with uterine PI > 3 and are absent without sub-endometrial vascular flow.
Conclusions:
- Sonography provides crucial morphological and vascular information for assessing implantation potential.
- Optimal implantation conditions include endometrium > 7 mm, hypoechogenic structure, PI < 3, and sub-endometrial vascular flow.