Dr. Rohini Patil explains that weight gain in happy relationships is often due to biological, psychological, and lifestyle factors. The 'nesting syndrome' prepares the body for potential pregnancy, increasing appetite and calorie retention. Shared meals, relaxed eating habits, hormonal changes from birth control, and reduced pressure to maintain appearance also contribute to this common phenomenon, indicating a positive relationship dynamic.source https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/do-women-gain-weight-when-they-are-in-a-healthy-relationship-a-doctor-responds/articleshow/122317154.cms