CONGRATS! This is such an exciting time for you, enjoy every incredible second. I have a 7 month old, and I continued on my regular training until the begining of the second trimester. You should avoid anything that is lying flat on your back, as well as leg press after your 1st trimester.I gained 50! and lost it all plus 15, and I swear it was because I: 1. Continued to exercise 3-4 times a week throughout 2. Was in great shape prior and 3. Had an 11.2 pound child via c-section!
As far as diet, try to eat as close to your normal diet (non competition obviously) add the calcium, and eat as many green vegetables and OJ as you can. The first trimester is very important in the develpoment of your little one, although he/she is so tiny. I trained up until the day I had my c-section, I squatted 135 for 2 sets of 8, and had to have a scheduled c-section. Of course, I was doing close to double that prior to getting pregnant
. If you are tired, rest. If you don't want to lift, walk and stretch. If you don't want to do anything, try to find a pre-natal swimming class, yoga, etc. The support is amazing that you'll receive from the other women. I loved being pregnant, it is such an AWESOME thing. Creating another life is a huge responsibility! Take care of yourself, and remember that some days are harder than others. Listen to your body, DO NOT be afraid to ask questions about anything and most importantly, enjoy yourself. Good Luck and be well!
Oh, by the way, the reason I squatted so much is because my OB said one of his patients squatted heavy and went into labor that afternoon. I do not recc this unless you are overdue, strong, and have a spot.