I was described as a princess when pregnant and my (male) boss uttered the immortal words 'do you think you are the only woman to ever get pregnant?' Why, because -
I asked if I could start work 15 minutes later and take the time off my lunch break because I kept fainting on the packed train.
I refused to rearrange the heavy archive boxes and climb up and down ladders at 14 weeks.
I got a chest and throat infection when I was 22 weeks which left me laid up for 2 weeks (I'm asthmatic)
I didn't make coffee often enough because the smell made me vomit (all through pregnancy)
I had to take some time off with migraines, yes proper unable to move migraines, not a bit of a headache as my head of office described them.
I wouldn't drink at the Christmas lunch, nor eat pate because I was 5 months pregnant at the time.
I took time off for maternity appointments, refusing to put in holiday.
I insisted on a health and safety risk assessment.
These are the worst examples but my boss was basically a twat and still (according to the few people I still see) wonders why I didn't go back.
Purely anecdotal (a survey of my friends!) for every 'princess' who milks it, there are more who do have horrible pregnancies with SPD, continuing sickness and generally feeling shitty for 9 months.