<prompt> Feature of post ovulatory endometrium on ultrasound is:Single hyperechoic thin lineThree line signProminent haloProminent posterior enhancement  <response>: Ans. is d, i.e. Prominent posterior enhancementRef: Transvaginal Ultrasound by Melvin G. Dodson 1sted, p86This is a very important QuestionIMPORTANT: The appearances of endometrium on transvaginal ultrasound during different stages of normal menstrual cycle has been summarized here.A. Just after menstruation days 3-7Single hyperechoic thin lines central endometrial echoB. At the time of ovulationHalo presentRelatively thin anterior posterior endometrial thickness 6mmNo posterior enhancementQThree line sign.QTrilaminar appearanceC. Luteal phaseMaximum endometrial thicknessHyperechoic endometriumLoss of haloQLoss of three line signQProminent posterior enhancementQ 