Yes it does I believe with my second baby I had been eating healthy and excerising and bam a month later I'm pregnant again..
most definitely!! i before I got pregnant with my first, I was overweight, smoked and drank a lot and just generally unhealthy,my husband and I had unprotected sex for 3 years with out ever getting pregnant,we just thought that I couldn't, then I started working out and stopped drinking and cut down on smoking a lot, I lost 50 pounds then BAM I ended up pregnant like a week after I reached my weight loss goal lol I honestly believe getting in shape. eating right and treating my body better is what allowed it to finally be able to get pregnant, although we were not trying at all we were still very excited