This article talks about how having fewer kids can help you live longer. This is simple possibly due to less stress and less focus on reproduction. Elephants have long life spans and few kids where birds have many and shorter life. This is interesting because it somewhat makes sense as when you stress more you loose more and tend to over exert yourself leading to other health issues. Telomeres are protective caps att he ends of chromosomes, which help a human live longer. They start at a certain length and divide every time a cell grows. Geese were compared to small bird species because Geese have a better ability to preserve the length of their telomeres. Scientists believe this true because animals with longer lifespans invest more in maintaining bodily functions. A very interesting fact is that the telomeres varied in gender of the Geese and are best preserved in males. Female geese have two different chromosomes which is totally different in humans. There is an article attached that is a study of longevity and reproduction in the historical human population.
other article: http://www.jstor.org.ezproxy.stockton.edu:2048/stable/2665611?&Search=yes&searchText=humans&searchText=reproduction&searchText=longevity&list=hide&searchUri=%2Faction%2FdoAdvancedSearch%3Fq0%3Dlongevity%26f0%3Dall%26c1%3DAND%26q1%3Dreproduction%26f1%3Dall%26c2%3DAND%26q2%3Dhumans%26f2%3Dall%26acc%3Don%26wc%3Don%26fc%3Doff%26Search%3DSearch%26sd%3D%26ed%3D%26la%3D%26pt%3D%26isbn%3D&prevSearch=&item=1&ttl=2749&returnArticleService=showFullText