The teenage pregnancy rate has tumbled in the last decade or more.
I also think there is far more to the gross obesity found in some people than just overeating. I believe that excessively overweight(exact figure will depend on age, gender and height) is a mental illness not a physical problem and more should be done to deal with the underlying psychological problems and they should be offered similar programmes to those attended by anorexics, including sectioning them if necessary.
I remember watching a programme comparing how the benefit system works now compared with when it was introduced after WW2. The interesting thing was, that while the system was harsher, the amount of practical help and support given to failing families: in-home instruction on child care, housekeeping, even how to garden, was much more present. The modern family experiencing it said how it helped them get their lives under control and one of the adults succeeded in getting a job and keeping it.
Now we are told that we must be 'non-judgemental' and 'respect' these chaotic life styles and leave these families to sink or swim, and, of course, they usually sink.