I cruised when I was about 4 1/2 to 5 months pregnant. Had lots of fun and no problems. Didn't get sea sick but we cruised in July - so no big storms or rough seas. Cruising during the second trimester is great. Past morning sickness, tiredness, etc. Starting to show but not huge. Just that happy to be pregnant and glowing feeling. It was great. Plus you could eat all you want and had on elastic pants! Doesn't get better than that! The only draw back is it does limit the excursions. Even some that you would think would be no big deal. They wont let you if you're pregnant. Liability reasons, obviously. I did take a note from my doctor just saying it was ok to cruise and I was healthy, etc. Just for my own peace of mind. The cruiseline says no crusing after 6 months. Since I was somewhat close to that mark I wanted documentation that I was only 4 1/2 to 5 months along. Didn't need it, but felt good knowing I had it. Any other questions, feel free to ask.