Planned parenthood is an important public health objective, but it is
difficult to obtain reliable figures concerning the number of unplanne
d pregnancies. This paper describes some of the key findings from two
local surveys-a Review of Family Planning Services and a Survey Examin
ing Reproductive Health Services for Women-which contributed to our un
derstanding of the risk of unplanned pregnancy in the Brighton Health
Authority. The Faculty of Public Health Medicine Guidelines examining
the effectiveness of contraceptive services were used to estimate the
likely number of women at risk of an unplanned pregnancy in the distri
ct and the result compared with the information from the local surveys
. A considerable discrepancy was apparent. The guidelines produced an
underestimate of the likely number of women at risk of an unplanned pr
egnancy compared to the estimate produced from local sources. Local so
urces estimated that 19 in every 100 sexually active women aged 16 to
49 years were at risk of an unplanned pregnancy but the guidelines pro
duced an estimate which indicated that only four in every 100 women ag
ed 16 to 44 years were at risk.