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Multiparity and bone mass

H Bererhi¹, N Kolhoff, A Constable

¹Department of Clinical and Biomedical Physics, Sultan Qaboos University, Muscat, Oman.

British Journal of Obstetrics and Gynaecology

|August 1, 1996

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High parity, or having many children, does not impact women's lumbar spine bone mineral density. This study found no significant link between the number of children and bone mass in normal women.

Area of Science:

Bone Densitometry
Reproductive Health
Osteoporosis Research

Background:

Bone mineral density (BMD) is crucial for skeletal health, and factors like parity (number of births) are investigated for their potential influence.
Understanding the relationship between reproductive history and bone mass is important for assessing women's long-term skeletal integrity.

Purpose of the Study:

To determine if multiparity (high number of births) affects axial skeleton bone mass in Omani women.
To investigate the correlation between the number of children and bone mineral density in a population of women with high parity.

Main Methods:

An open study was conducted on 159 normal Omani women presenting with low back pain.
Bone mineral density was measured using dual-photon absorptiometry.

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Data on age, body size, and number of children were collected and analyzed.

Main Results:

The mean bone mineral density was 0.984 g cm-2.
The mean age of participants was 43.4 years, with ages ranging from 20 to 70 years.
While age and body size showed a strong correlation with bone mineral density, the number of children per woman (mean 5.1, range 0-14) did not have a statistically significant influence.

Conclusions:

Multiparity does not appear to influence lumbar spine bone mineral density in normal women.
The findings suggest that factors other than the number of children, such as age and body size, are more significant determinants of bone mineral density in this population.