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Morning after pill linked to increase in STIs, study shows
Date:1/31/2011

versity Business School, aimed to test the assumption that providing emergency contraception for free to teenagers could lead to an increase in risky sexual behaviour, potentially leading to an increase of STIs as sexual partners substitute the morning after pill for condoms and cancelling out any benefits from an increase in the number or people using emergency contraceptives.

The study looked at all teenage pregnancies, and two sub-groups of under-18s and under-16s, between 1998 and 2004 using data obtained from the Office of National Statistics.

To measure STIs, the researchers used data on the number of diagnoses of the main STIs at genitourinary medicine (GUM) clinics, provided by the Health Protection Agency, in the same age groups (apart from under-18s for which STI data are not available).

These were compared to a control group of women aged over 24, who did not have access to pharmacy EBC schemes.

The study found that teenage conception rates showed a downward trend from a peak in 1998 (two years before the pharmacy EBC scheme started, a year before the Teenage Pregnancy Strategy) until 2003, followed by a small increase in 2004, just as the EBC scheme reached its peak.

In terms of STIs, rate for teenagers and older women both increased consistently over the period. However, rates among teenagers increased at a faster rate and there is some evidence that the gap with rates among older women widened as the EBC schemes progressed.

It found that the EBC schemes had no effect in reducing teenage conception rates and even some evidence that pointed to a small increase in the number of pregnancies.

The presence of an EBC scheme in a local health authority was linked to a five per cent increase in STIs in the under-18 age group and a 12 per cent hike in under-16s.

The researchers warned that as the figures only show the number of diagnoses at GUM clinics, rather than the total number of infect
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Contact: Emma Thorne
emma.thorne@nottingham.ac.uk
44-115-951-5793
University of Nottingham
Source:Eurekalert

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