Teenage pregnancy rates in one of the Midlands' most affluent areas have soared, according to Government figures.
The proportion of teenage mothers rose by 7.2 per cent in Solihull between 1998 and 2004.
High teenage pregnancy is normally associated with areas of deprivation, low educational achievement, and in inner city wards.
Solihull is characterised by a large number of well-off professionals and high quality schools, sparking fears the trend is spreading to middle class regions.
Figures out today also show Ministers missed a target of a 15 per cent reduction in the proportion of under 18s getting pregnant.
Despite Tony Blair's Teenage Pregnancy Strategy launch in 1999, the actual reduction across the country was 11.1 per cent.
Health officials in Solihull last night admitted they were unsure why the rate had risen in the face of drops in almost every other part of the country.
"What happened in 2004 was that there was an increase of around 48 extra conceptions," said Dr Chris Godfrey, a consultant in public health at the Solihull Primary Care Trust.
"We did see this blip - we think that was a blip in one year. We have been trying to work out why it happened."
Solihull, along with Here-fordshire, was the only authority in the West Midlands not to see a drop in teenage pregnancy.
But Dr Godfrey stressed the actual numbers of new teenage mothers in the area - about 180 for 2004 - was relatively small and, therefore, more prone to fluctuations.
"When you have a smaller number of events a small change makes a big difference and that is what is happening in Solihull," he said.
Dr Godfrey also stressed areas like Chelmsley Wood and Fordbridge, in the north part of Solihull, were as deprived as any inner city area and might be responsible for the rise.
Nationally, the average number of girls aged 15 to 17 per 1,000 getting pregnant was 41.5 in 2004. In the West Midlands it was 45 per 1,000 girls.
Solihull's teenage pregnancy rate was 43.2. Stoke-on-Trent had the highest rate in the region of 67.4, although the figure was a drop of 1.6 points on 1998.
Next worse was Wolverhampton at 60.8 per 1,000 teenage girls, followed by Sandwell at 56.6.
Britain has the highest teenage pregnancy rate in Europe. The Government has spent millions of pounds on sexual awareness programmes in schools.
Figures from the Office for National Statistics' Teenage Pregnancy Unit show that apart from a few exceptions - most notably inner city London - the proportion of school age conceptions is falling.
Children, Young People and Families Minister Beverley Hughes praised Walsall and Staffordshire, which have seen a fall in the teenage pregnancy rate of 27.5 per cent and 20.5 per cent respectively.
But she warned: "Other authorities in the West Midlands that are not yet achieving this degree of success need to look at those that are - both in the West Midlands and beyond - and raise their game."
Walsall said its success was down to a range of initiatives including sexual health advertising on buses and trains, projects in schools, and peer mentoring work by teenage mothers.
Martin Turner, of the Walsall Teaching Primary Care Trust, said there was a need to counter the messages sent out to youngsters by advertisers.
"If you were to check the number of references to sex on TV adverts outside a relationship they are great, while the number of references to consequences and taking protective measures are small," he said.