Categories: Research

Decline in semen quality from 1930 to 1991

Rigshospitalet, afdeling for vaekst og reproduktion GR 5064, Kobenhavn.

It has been suspected for years that semen quality has declined. However, the issue is still controversial since previous studies were criticized for methodological errors. We therefore attempted to systematically review the complete international literature on semen quality since 1930 with rigorous selection criteria and statistical analysis. Based on a literature search using Cumulated Index Medicus and Current List (1930-1965) and MEDLINE Silver Platter database (1966-august 1991), we identified 61 papers concerning sperm density in a total of 14,957 males without a history of infertility. A significant decline in mean sperm density from 113 x 10(6)/ml in 1940 to 66 x 10(6)/ml in 1990 (p < 0.0001) and in mean seminal volume from 3.40 ml to 2.75 ml (p = 0.027) was noted. The incidence of testis cancer and possibly also that of cryptorchidism and hypospadias has increased during the same relatively short time period. Such a remarkable deterioration in male genitourinary function is more likely to be due to environmental rather than genetic factors.

Lorna McFadden, DCH

I have been a certified dental assistant for the past 16 years. Over that time I have been interested in many of the healing arts. In 1993, I became a reflexologist and continued to study other forms of alternative health. My passion for Homeopathy began when I was treated by a homeopath in 1998. I really resonated with the philosophy and treatment of homeopathy. Only after a few consultations I knew I had to become involved and help heal others. With restored health and a great deal of energy, I am driven to study this wonderful healing art. I have successfully completed the first milestone in my homeopathic career by graduating from the Vancouver Homeopathic Academy. I hope to write my Certification of Classical Homeopathy in the next few years. I am a member of the West Coast Homeopathic Society and regularly attend study sessions to stay updated and educated. I also attend local trade shows and educate the public on Homeopathy. I am recently married and reside in Langley with two cats and a golden retriever named Montana. My animals are wonderful homeopathic patients.