Hi there,
Thanks for posting. Your undergrad greats were great, grad school grades ok, and solid work experience though very technical so fyi you'll be competing against a lot of other similar profiles, and should focus on trying to show how you've demonstrated leadership through your initiatives etc. The career break does not have to be a huge issue in general if you are honest and describe the health/pregnancy issues, schools won't hold that against you PER SE, but the challenge is if you are applying right off of that, it could be tougher.... they could be concerned that you haven't been in the workplace recently so would possibly be less prepared to contribute to classroom discussions etc, plus even things like getting a rec from a current supervisor wouldn't be possible, etc. So another thought might be to start back at work and get another year going and apply next year, and things might look a bit better, just something to consider.
That's a long school list! In general you will want to look at the average GMAT scores to get a feel for how you stack up in that way as a starting point (published on school websites, on the US News Rankings, and/or on Businessweek.com). From your list, the bigger reaches are likely Said; Judge; UCLA; Darden; Cornell; NUS, for example. None will be guaranteed-- as you do have to tell your story, explain the WHY and your goals and why now is the right time for you and what you'll bring to the program etc. For more on choosing schools, check out our free download at:
https://info.mbamission.com/Selecting-Yo ... ram-E-Book.
Good luck!