What Does It Mean If Theres No Yolk Sac on the Ultrasound?
What Does It Mean If There’s No Yolk Sac on the Ultrasound? In early pregnancy, the yolk sac functions as a source of nourishment for the developing baby before ultimately being absorbed by the baby as a part of the gut. The yolk sac is the first thing to become visible inside the gestational sac on a transvaginal ultrasound, appearing at an average of 5.5 to 6 weeks’ gestational age. Answer: When an ultrasound shows no yolk sac, the reason may be miscarriage but it could also be that the pregnancy is still early. Because the yolk sac first becomes visible around 5.5 weeks of gestation, seeing no yolk sac on an ultrasound could simply mean that the pregnancy is not yet 5.5 weeks along — and errors in remembering the last menstrual period or irregular cycles can affect calculations of how far along a pregnancy is at the t
