Quoting Gina Crone:" The doctor said that She wants to deliver at 36 or 37 because she's worried about baby B. She also told ... [snip!] ... conceived at different times, our first ultrasound shows the one and then we went to the next ultrasound and their was two! "
So I just have to.
They won't schedule a delivery that early unless there is a SERIOUS issue. You aren't due until february. I am sure there will be large changes before then. My twins are fraternal. They look opposite as night and day. Baby B was measuring anywhere from 5-8 days behind baby a every time. I know I didn't get pregnant with one then the other a week later. It is common for one twin to measure behind during most if not all of the pregnancy. Now to look at my girls, Baby B is the larger of the two. As for your boys "not looking alike at all", that is not always the case. Many siblings that aren't even twins are very similar in looks. It is pretty early to even guess what they will look like. That is a very silly thing to say and for them to even tell you. I am concerned about the medical staff you are seeing.
There is a such thing as a hidden twin. Just because you didn't see one in the first u/s doesn't mean it wasn't there. I am curious how far along you were with your first U/S then your second.
Just because your MIL is a nurse, she can't just "give you" a copy of your file. If I tell you the steps that they have to go thru for that you will likely tell me that you did all that. So, I won't say anything.
The more you post, the more I question things. ESPECIALLY because I am a mother of twins and have been there done that. Not that every pregnancy is the same but, you aren't far enough along for them to make the call of a 37 week delivery. Especially if one is supposedly a week "younger". That would make the baby they are "worried" about only 36 weeks and clearly not at the "term" marker.