Loosing weight be4 baby #2?

My daughter just turned one over the weekend. We've been trying for our 2nd child for 3 months. Nothing yet..... But I am still 15 pounds heaveier then when I first got pregnant last year. Wondering if it's really a good idea to loose that first or say f it and deal with the weight loss after number 2? Also hear by losing weight it changes hormones and might help us get pregnant?! Any thoughts ??