Características ecográficas do corpo lúteo em gestações iniciais: morfologia e vascularização

Abstract

ResumoOBJETIVO: avaliar os aspectos morfológicos e vasculares do corpo lúteo (CL) por parâmetros ultrassonográficos durante a gestação inicial e sua associação com o abortamento. MÉTODOS: estudo de coorte, prospectivo com 90 gestantes entre 6 e 8 semanas mais 6 dias de gestação. Foram incluídas gestantes de baixo risco, sem doença sistêmica aguda ou crônica, e com concepção espontânea. Abstract PURPOSE: the purpose of this research was to evaluate the morphological aspects and vasculature of the corpus luteum (CL) based on ultrasound parameters during early pregnancy and to assess their relationship with early pregnancy loss. METHODS: this was a prospective cohort study of 90 pregnant patients between 6 and 8 weeks plus 6 days weeks of gestation. We included women at low risk, without acute or chronic systemic disease and with spontaneous conception. Exclusion criteria: use of drugs or smoking, drugs inducing ovulation, history of more than one abortion, no heartbeat visible in the embryo and impossibility of visualization of the corpus luteum. The size, volume, morphological aspects, resistive index, and peak systolic velocity of the corpus luteum were measured by transvaginal sonography. RESULTS: ninety patients were included in the study. Maternal age ranged from 15 to 41 years (mean 28.6±5.8 years). The corpus luteum could be visualized in 87 patients (96.7%), 79 patients had normal pregnancies (90.1%), whereas spontaneous losses occurred in 8 cases (9.9%). In a comparison of the survivors and losses, there was no difference in mean CL diameter (21.8 versus 20.0 mm; p=0.108, Mann-Whitney test), mean CL volume (4.2 versus 3.0 cm 3 ; p=0.076, Mann-Whitney test), mean resistive index (0.55 versus 0,58; p=0.220, Mann-Whitney test), peak systolic velocity (15 versus 15 cm/s; p=0.757, Mann-Whitney test). There was a positive relation between maternal age and resistive index. CONCLUSIONS: no apparent correlation was found between the morphological and vascular aspects of the corpus luteum in early normal pregnancies and first-trimester pregnancy losses.

The Role of Blood Flow in Corpus Luteum Measured by Transvaginal Two-Dimensional and Three-Dimensional Ultrasound in the Prediction of Early Intrauterine Pregnancy Outcomes

“…The major findings of our study were: a) the RI and PI were significantly lower in normal pregnancy group, while the D, V, VI, FI, and VFI were significantly higher; b) the AUC for ROC curve of RI among the two-dimensional parameters and FI among three-dimensional parameters were significantly higher; c) the joint indicator of RI and FI was not superior to individual RI or FI in the prediction of early intrauterine pregnancy outcomes. Our results were in accordance with the previous study (Pareja et al, 2010), when comparing the diameter and volume of the CL of normal pregnant women with those who aborted, found lower diameter and volume in cases of abortion. Many studies had demonstrated that RI and PI were significantly higher in patients of abortion (Applebaum, 1995; Durfee and Frates, 2015).…”

“…Transvaginal sonography has unique advantages in detecting the CL function by measuring its morphology, echo, size, volume, as well as evaluating the vascularity with color Doppler velocimetry. Previous researches did not reach an agreement about the morphology and echo of CL, which may attribute to individual difference (Pareja et al, 2010; Durfee and Frates, 2015). Therefore, we did not research the morphology and echo of CL in our study.…”

Follicle and corpus luteum size and vascularity as predictors of fertility at the time of artificial insemination and embryo transfer in beef cattle

“…Color-Doppler ultrasonography was previously used in cows to evaluate the vascularity of follicle, CL, and conceptus (Myamoto et al 2005, Pareja et al 2010, Silva et al 2010). Therefore, since it is a non invasive technique and with reliable application, it is a useful tool to target new reproductive diagnoses.…”

Intoxicação Pelo Metanol Aspectos De Imagem Na Tomografia E Ressonancia

“…Fonte: CNEN, 2019. A morfologia do corpo lúteo é frequentemente descrita como uma estrutura hipoecogênica (PAREJA et al, 2010). Cisto folicular (Figura 1A) é uma estrutura > 25 mm de diâmetro em um ovário que persiste por mais de 10 dias na ausência de um corpo lúteo sendo anecoico (BAITLESOV et al, 2007;FERNANDES et al, 2005).…”