Go for it Velvet!!!
You may meet one or two guys with sexist attitudes, but they are becoming extinct.
My wife, a regional SAAB 340 capt, has had two babes during her time in the airline. The biggest problem by far is child care after you return to work. The airline was more than helpful and gave her some casual ground instructing, course preparation etc while she was grounded.
The law in Oz is very supportive, so we had an easy time, I guess, especially the requirements for when she returned to flying.
Give flying away as soon as you test positive. There are SOOOO many unknowns about pregnancy and flying. Don't chance it. At risk of severe flaming, she said herself that she was no where near at her best in decision making, concentration, workload management etc. while pregnant. Remember, SHE said it, not me. She flew in command of a Metro 23 for several months the first time - we now agree that it was not smart.
Good luck with your career!!