Didn't have to sit in lecture seats when preg and studying thankfully, but just one tip with it, pick an end seat for when you need to go to the toilet often.

Don't want to worry you, but you may want to watch out for carpal tunnel later in pregnancy. Mine was so bad I could barely write, I worked fulltime on the computer all day and went to uni part-time. I had to ask to be able to type my exam rather than write, it would have taken too long and been unreadable. Thankfully it was held in the computing room as part of the exam was using certain software, so I was allowed to use Word and print my answers.