I found this on-line: The yolk sac first appears during the fifth week of pregnancy and grows to be no larger than 6 mm. Yolk sacs larger than 6 mm are usually indicative of an abnormal pregnancy.
Thursday, January 14, 2010
Enlarged Yolk Sac
I was feeling a bit stressed about my last visit and the baby measuring behind a week so I called for an appointment this week. The baby has grown but is still behind. He is measuring 7 weeks 1 day and I was 8 weeks 4 days when the scan was taken. I did hear the heart beat which is so amazing but then I got some bad news. The yolk sac is measuring 9.2 mm and it should be disappearing and becoming the umbilical cord. This is an indication that something might be abnormal with the baby and I could suffer a miscarriage.