I have been asked by a number of women if they will still be able to still model if they are pregnant. Woman who are pregnant are able to get jobs that non-pregnant models simply can’t book. Quite often the stomach needs to be showing, so just stuffing a pillow under a shirt will not work in many circumstances.
While it is true that being pregnant will open up some jobs that you could not get otherwise, you will find that there are a limited amount of jobs available for pregnant woman.
If you are working with an agent, let him/her know that you are pregnant so he/she can keep you in mind for the right types of jobs.