There are some preliminary findings that specific types of plastics, when ingested, reduce fertility in both humans and dogs: https://www.nature.com/articles/s

There are some preliminary findings that specific types of plastics, when ingested, reduce fertility in both humans and dogs: https://www.nature.com/articles/s41598-019-39913-9 https://www.nature.com/articles/s41598-019-39913-9