One thing that does seem to be different is the mode of dress. It's not uncommon to see a young mom-to-be with her baby bump exposed in public. Definitely something you would not have seen half a century ago.
I remember black and white photos of my mom and her sister, both pregnant at the same time, wearing skirts and sleeveless maternity tops, white socks and saddle shoes. Seems like the saddle shoes were her favorite because they appeared in a lot of those photos from the 1950's.
This maternity top is much like the one I remember from that photo. With only three pattern pieces, this pullover top is easy to sew and an expecting mom could probably whip one up in an hour.
This free download prints out on 8.5 x 11 sheets of paper. Download HERE.
Find more of these easy to sew maternity patterns at my CynicalGirl shop on Goodsmiths.