Men often measure manliness by penis size. The bigger the penis the more manly the man, but medically speaking, penis size does not necessarily correlate with manliness. Just like no two people have the same fingerprints, no two men have the same penis, but that doesn’t mean one man is more fertile than another. Penis size does not generally affect fertility. Men with small to average penises can be more fertile than men with larger penises, but there is some indication that anogenital distance could be a measurement that men should heed in terms of fertility. 

Anogenital Distance and Your Fertility

Anogenital distance is the distance between the anus and the spot where the scrotum attaches to the body. The average distance is just two inches. Some men measure longer distances and other men shorter distances. The anogenital distance, also known as AGD, can help determine fertility with shorter distances correlating to reduced fertility. This distance has nothing to do with penis length. 

Longer Penises Deposit Semen Closer to the Cervix – Truth or Myth?
The depth of the vagina can range from three to seven inches. During intercourse, the vagina elongates because the cervix moves out of the way. In theory, a man with a longer penis would deposit semen closer to the cervix. If the penis is too long, it will bump into the cervix during intercourse because the cervix will not ascend deeper into the body for a longer penis or vice versa. So, a man with an above average penis may bump into the cervix, but semen will be deposited at the cervix. The same can be said for men with an average penis that falls just short of the cervix as semen is projected into the vagina with force reaching the cervix even if there is a slight difference in penis length. 

Penis length is not directly related to fertility. There are medical conditions that cause an extremely small penis, but these conditions are rare and affect a small portion of the reproductive population. Most men fall within normal penis lengths of five to six inches with no relationship between longer penises and increased fertility.