Time to pregnancy among Danish pharmacy assistants.

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Abstract
Time to pregnancy was studied as a parameter of couple fertility in a national cohort of all female members (< 40 years) of the union of pharmacy assistants from 1979 to 1984. A total of 4 924 women were included in the study. Information on time to pregnancy and exposure was obtained by postal questionnaires in April 1985 (response rate 92%). Prolonged time to pregnancy according to occupation in production or a dispensary or in product control, bottling, and packing is presented, unexposed pharmacy assistants being used as referents. It was possible to use time to pregnancy in an occupational settin g as 95% of the women were able to state their time to pregnancy and as 90% of all pregnancies were planned. No association was found between type of work or pharmacy and time to pregnancy, but pharmacy assistants exposed to antibiotics had a slightly increased risk of prolonged time to pregnancy.