Read somewhere online that dental hygiene can effect fertility.. is this true?

Dental hygiene/pregn: Poor oral health is just as bad for fertility as obesity, and could delay the time of conception by as much as two months. An Australian study, is the first report to suggest that gum disease might be one of several factors that could be modified to improve the changes of a pregnancy,

Indirectly: Dental health affects overall health, which affects fertility. Based on studies to date, it is unclear whether good dental health is just a marker which identifies people who take care of themselves, and therefore have better overall health, or if good dental health actually leads to better overall health. Either way, there is no reason not to have good dental hygiene, so go for it!

Doubtful: Those blogs refer to a study done in Western Australia that demonstrated an association but not correlation, and it was observational. Follow up randomized controlled trials (ones that blogs and media do not bother to read) have not demonstrated any outcome benefit when treating periodontal disease in pregnancy. Obviously, one would want to be in the best of health prior to pregnancy anyway.