====== Vesper (VESP) ======

Vesper is one of Lifelines' [[additional assessments]].\\ 
This assessment is a collaboration between Lifelines and the Radboudumc centre of expertise on [[https://www.radboudumc.nl/expertisecentra/late-effecten-na-kanker|late effects of childhood cancer]] (SKION LATER), in association with the UMCG [[https://www.umcg.nl/NL/UMCG/Afdelingen/voortplantingsgeneeskunde/Research/Paginas/default.aspx|department of reproductive medicine]].\\
The goal of the assessment is to quantify male fertility in the general population using a fertility questionnaire, [[https://en.wikipedia.org/wiki/Semen_analysis|semen analyses]], and plasma [[https://en.wikipedia.org/wiki/Testosterone|testosterone]] measurements. The results can be used as control values in fertility research, for example on cancer-related infertility. \\

===== Protocol =====

Vesper started in Q3 of 2019 and will run until 200 male participants have finalized the protocol.\\
Participants between 18-55 years old are invited: 
  * to fill in a digital questionnaire about their [[family composition]], [[family planning]], and [[fertility]] 
  * to visit the UMCG blood sampling policlinic for the donation of a blood sample and
  * to visit the UMCG policlinic of reproductive medicine to produce a fresh semen sample, which will be analyzed the same morning.

===== Subcohort =====

Inclusion criteria were:
  * Male
  * 18-55 years old
Exclusion criteria were:
  * Being vasectomized
  * Working nightshifts
  * Survivor of childhood cancer

===== Questionnaire =====

===== Semen Sample =====

===== Blood Sample =====