%0 Journal Article %T Are there too many “times-to-pregnancy”? %A Olsen, Jørn %J Scandinavian Journal of Work, Environment & Health %D 2016 %8 March 42 %N 2 %@ 0355-3140 %F Olsen2016 %X

The time between marriage and the birth of the first child has been used by demographers as a measure of fecundity, but such a measure only works if cohabitation and wanting to have a child are closely linked to marriage. In a world where pregnancies can be planned for those who have access to safe contraception methods, couples may know their “time-to-pregnancy” (TTP) as the waiting time from when they stopped using contraceptive methods until becoming pregnant or being classified as infertile (a period of ≥12 months). This TTP measure was first used in 1981 (1) as a measure of couple fecundity and it has been applied widely with success and failure in many areas of research including work-related fecundity problems (2, 3, 4). In this letter, some less well-known limitations of the TTP measure are discussed.

%K DAG %K directed acyclic graph %K fecundity %K misclassification %K pregnancy %K time-to-conception %K time-to-pregnancy %R 10.5271/sjweh.3548 %U https://www.sjweh.fi/show_abstract.php?abstract_id=3548 %U https://doi.org/10.5271/sjweh.3548 %P 175-176