Soda consumption, particularly sweet beverages have been linked with health issues including infertility. Sugar based beverages have been considered to

1. Reduced sperm count in men: High consumption of sugary sodas has been linked to reduced sperm quality in men. Some research suggests that the high levels of sugar and caffeine in soda may contribute to oxidative stress, which can damage sperm DNA and decrease sperm motility.

2. Obesity and gain in weight: Regular consumption of sugar based beverages like soda can help in gaining weight. This increase the risk of becoming obese which will impact fertility in both men and women.

3. Insulin Resistance: Regular consumption of sugary sodas can also lead to insulin resistance, a condition where the body’s cells become less responsive to insulin. Insulin resistance has been linked to infertility and can disrupt menstrual cycles in women.

4. Impact on Hormones: Some studies suggest that the artificial sweeteners found in diet sodas may disrupt hormonal balance.

Making dietary changes, including reducing soda consumption, may be beneficial for overall health and fertility. Several studies published in research papers talk about impact of soda and sugary beverages on sperm health in men and fecundability in women. Here’s a popular paper on this topic.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5882510