Hi dears, I just wanted to give you an update.
I went to the "high risk specialist" appointment yesterday my original doctor had suggested and it consisted of 1 hour genetic counseling and yet another ultrasound. The genetic counselor informed us about the risks (Down, Cystic Fibrosis etc) but used a more positive language and said it is more likely than not that none of these consequences will manifest. With the help of this forum I had already found out from my doc before that my blood shows no cystic fibrosis marker, yet the genetic counselor said they test for about 80% of the most common cystic fibrosis mutations, so there is a residual risk -- just as with the harmony test.
Also, I learned from a friend that echogenic organs are more frequently seen in older women (as I said I am turning 39 and this is my first pregnancy). They are more concerning in young pregnant women. In her second daughter they spotted an echogenic heart at week 20, it was there all during the pregnancy up to the birth, and her daughter is perfectly healthy.
The echogenic bowel was still visible on the baby (it appeared brighter), that aside from that shows normal growth. I think I was really expecting that it may have disappeared, yet the doc said, even if it would have disappeared -- once spotted on an ultrasound the risks persist. Echogenic bowels are expected to disappear int he third trimester but may just continue to be there.
I learned in the meantime that an echogenic bowel is more concerning if there is other "soft markers" accompanying the phenomena (as I think also someone said above). The bottom line of the appointment was that they actually just do not know (!) why the bowel shows as echogenic and can tell nothing (!) until the baby is born. They just recommended to monitor the baby's growth more closely, at least once a month, until it is due. They did propose an amnio, which I refused. They also proposed a "fetal echo" (closer heart exam, yet the heart shows normal and has absolutely normal heart beat) which....I cancelled. Because you know what? I have enough for now of medical panic, probabilities that arbitrarily vary depending on the doctor you speak to, the salesman-ethic of selling more and more prenatal tests that will make me worry more and more. For now I am going with my guts and my heart, and will trust that it is going to be alright. That is ultimately best for my baby too.
Thank you for your wonderful help here.