Responses

Download PDFPDF

Human semen quality in the new millennium: a prospective cross-sectional population-based study of 4867 men
Compose Response

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
Author Information
First or given name, e.g. 'Peter'.
Your last, or family, name, e.g. 'MacMoody'.
Your email address, e.g. higgs-boson@gmail.com
Your role and/or occupation, e.g. 'Orthopedic Surgeon'.
Your organization or institution (if applicable), e.g. 'Royal Free Hospital'.
Statement of Competing Interests

PLEASE NOTE:

  • Responses are moderated before posting and publication is at the absolute discretion of BMJ, however they are not peer-reviewed
  • Once published, you will not have the right to remove or edit your response. Removal or editing of responses is at BMJ's absolute discretion
  • If patients could recognise themselves, or anyone else could recognise a patient from your description, please obtain the patient's written consent to publication and send them to the editorial office before submitting your response [Patient consent forms]
  • By submitting this response you are agreeing to our full [Response terms and requirements]

Vertical Tabs

Other responses

Jump to comment:

  • Published on:
    Semen quality in young men twenty years after Carlsen et al.

    Dear Editor, Twenty years ago Carlsen et al. analyzed data from 14,947 men included in 61 papers published between 1938 and 1991 and concluded that sperm concentration had declined significantly over the prior 50 years (1). Numerous criticisms and analyses followed this landmark publication. Among these, our detailed reanalysis found that this conclusion was, indeed, supported by the underlying studies (2,3). Many other i...

    Show More
    Conflict of Interest:
    None declared.