My wife is a figure competitor and is currently breast feeding.
My advice is to not worry too much about it right now. It’s a little different if a woman isn’t breastfeeding. Then, her body starts to adapt and cutting won’t make as much difference.
Women who are overweight naturally lose weight while breastfeeding because of how many calories it uses up. But, leaner women need to be more careful.
My wife stayed in great shape throughout pregnancy and thought she’d bounce back right away. She looks good, but she’s not as lean as she’d like. This is because every time she’s cut calories even a little bit, her milk has dried up.
Whoever you client is needs to focus on breastfeeding if that’s her choice, and diet later. As she recovers from labor, she’ll be able to resume a lot of exercise fairly soon.
women should not use pregnancy as an excuse to eat large amounts of whatever they want, that whole eating for 2 is BS, probably only need to eat an additional 200-300 cals, my wife's daily diet did not change by much, and without doing anything special she was back to her pre preg weight in 3 1/2-4 months, if someone blows up while they are pregnant just use common sense and cut calories, not starve yourself.
Breastfeeding can equal burning up to 500 calories per day!! That is the best method right there. Put that milk in the fridge, let it settle and you`ll see its all water and the fat floats to top. Just healthy clean diet, exercise depends on if she had c-section or vag. Don`t be a knuckle dragger like some people and say "you need to lose weight" a few weeks after giving birth. Stress how she needs to "rehab" her abdominal muscles because they actually separate to accommodate expansion of the uterus. Even more important for c-section.
I saw that happen to a teacher I used to teach with. I think she lost nearly 40 lbs. She was overweight to begin with and I think the morning sickness and just overall sick feeling she had most of the time caused her to not eat as much as usual. That was crazy to see. She looked a lot better pregnant! Then she gained weight back after having the baby!