From what I've read in Atkins, there havn't been enough studies to prove weather keotenes are dangerous for a baby or not, but he belives it is better to error on the side of caution then to have a baby with possible birth defects that could of been prevented.

Another thing to consider is your fat stores are just that, fat. You're body has already processed out all the nutrients and used many of the essential things, then has taken some of the fatty acids or what ever and placed it in fat cells for storage. When pregnant you only need an extra 200 calories a day, but you need a lot more protien and vitamins. Not all nutrients can be gained from suppliments as many things can not be processed in the lab, and the body absorbes nutrients better from foods. It makes much more sense to have every bite you eat to be as nutrrient rich as possible, though there will be slipups as those darn pregnancy hormones take over. You yourself will also need the energy as pregnancy is very stressful on the body and tiring.

Pregnancy lasts only 9 months. It is a special time, and normal to gain some weight. You then have many many years to take that weight off. If you have only gained a healthy amount, then it will come of fairly rapidly. Experimenting or trying to continue a weight loss program can have devistating effects that you and that child will have to live with for the rest of your lives. Can you be the one to explain to him or her why they have a certain problem and that it was trying not to gain weight?

Find out for sure if your pregnant, then relax and go on maintanance. Enjoy fruits and other healthy foods that are slightly higher in carbs. Maintain an exercise program that keeps you fit and full of energy while pregnant. Then once the baby is born you will still be in somewhat good shape from keeping up the program and can continue with it easily and stick to the healthy eating habits you've cultivated, and get back to prepregnancy weight or better in no time.