Injectable birth control is well known that but women can reduce bone density may be to limit the loss of data, not to smoke and get a same moderate amount of calcium, a new study tips.
The results, say researchers, show that not all women equal risk of the use of medroxyprogesterone (DMPA) - bones are better known under the name of the brand Depo Provera.
DMPA is given by injection once every three months and is generally regarded as effective, practical and affordable birth control. However, the contraceptive may lead to substantial bone loss.
While research has shown that these bones are lost stop after women, DMPA mass often found, there is still concern whether the substantial bone loss is completely reversible. To limit the decline would be ideal in the first place.
In the new study, the researchers found that the 95 women, who used the DMPA for two years, smoked or had to have a low intake of calcium were especially vulnerable loss of significant bone density - defined as a decline of at least 5% spine and hip part.
Current smokers were almost four times more likely to lose that much bone mass as a non-smoking. The risk however decreased by 19 percent, each 100 milligrams (mg) every day of calcium, a woman.
Dr. Mahbubur Rahman and Abbey b. Berenson, at the University of Texas Medical Branch in Galveston, report the results in the journal obstetrics and Gynecology.
The study included 95 black, white and Hispanic women 24 years on average at the beginning. Their bone density was measured, when it began, DMPA and use two years later.
47% Of women have shown at least a reduction of 5% of bone density in the spine or hip.
These women, 44% were current smokers, compared to 32% of women, the less lost bone mass. In the first group calcium intake was 484 mg per day - less than half of the mg-1 000 recommended for women of their age.
Function Rahman and Berenson, who beat discoveries before, that a long way on the limitation of bone loss associated with not smoking DMPA can go. The same is for even moderate calcium intake; Women have received more than 600 mg of calcium per day lower bone - 2% or less for the loss of two years.
Other results were women who never had a child with substantial bone loss risk. They probably were half than women without children to see, to reduce their bone density of at least 5%.
The results of DMPA users who had no children, smoking and at least 600 mg rise on the day of calcium, write "Concern about bone health are minimal," Rahman and Berenson propose.
But if women get smoking or little calcium, they add, doctors offer help with smoking cessation and consultation on calcium-rich foods and take supplemented, if necessary.
Source: Gynecology and obstetrics, January 2010.