My (27M) wife (26F) has gained a lot of weight. How do I approach her about this?

My wife has put on about 30lbs in the past year and a half. I'm really worried about her health. She used to be very self-conscious about her weight and went to the gym regularly. Now she doesn't even use the gym membership anymore. She has also stopped having sex with me, stopped cuddling, and stopped wearing anything but sweatpants.<br><br>I seriously think that the weight gain might be causing her depression and low self esteem. I can see a correlation. I want to talk to her about this but I am terrified that she will take it as an insult. She's already told me that she feels self-conscious about her weight and that she wants to start working out. She just says it's hard when you have kids, and I kind of get it. I was more in shape when I was single too.<br><br>How do I talk to her about this without sounding like a total douche nozzle?<br><br>EDIT: Holy smokes this blew up. I'm super grateful for the support and words of advice. We spoke yesterday. I told her that I was worried that her weight was killing her libido and that I missed being intimate with her. I apologized if I had upset the weight gain by making comments or if I reminded her of her weight. I told her that I would fully support her in losing the weight with diet/exercise or to just accept herself the way she is and live with it. She told me that the weight gain was making her more self conscious and that she wanted to start going to the gym again, but it was a real challenge.<br><br>She admitted there were other problems which were also driving her lack of intimacy. After over an hour of talking we came to the conclusion that she was unhappy in our marriage. I was gutted. I had no idea she felt this way. We talked some more and she said that the problems were things we could "work through" but that she was just starting to feel really unhappy and that it was affecting her overall mood. We agreed that we would talk things through with a counselor.<br><br>On a brighter note. She did agree that a healthier lifestyle would be good for her. She also agreed that it would make her feel better and that she would start going to the gym. She did say that she was sad because I only brought it up because of the lack of intimacy, and that made her feel bad about herself. I apologized profusely for this, and assured her that it wasn't like that. I was concerned about her health first and foremost. In the end I think the conversation helped a lot. It forced us to talk about other problems we had in our marriage and I'm glad we could be so open and honest with each other.<br><br>Again, thank you all for the feedback!