A longitudinal study of respiratory changes in normal human pregnancy with cross-sectional data on subjects with pregnancy-induced hypertension
Article Abstract:
Structural and chemical changes induced by pregnancy alter the functioning of the respiratory system. The increase in the consumption of oxygen and the production of carbon dioxide during pregnancy do not upset the balance of acid and base in the blood. The respiratory changes during pregnancy have not been well studied. Respiratory changes were studied in 20 healthy pregnant women throughout pregnancy and after delivery. The resting tidal volume (the amount of air inhaled and exhaled during breathing), the minute ventilation (the amount of air expelled from the lungs per minute), oxygen consumption and carbon dioxide production all increased during pregnancy. The end-tidal carbon dioxide tension decreased progressively throughout pregnancy. The ratio of air expelled per minute to oxygen consumption was higher at the end of pregnancy than after delivery. There was no difference between respiratory changes occurring during a normal pregnancy and those during a pregnancy complicated by high blood pressure. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: American Journal of Obstetrics and Gynecology
Subject: Health
ISSN: 0002-9378
Year: 1990
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Ultrasonographic bone velocity in pregnancy: a longitudinal study
Article Abstract:
Pregnant women should make sure they receive enough calcium during their pregnancy. Calcium is often taken from the mother's bones to create the bones of the fetus. Researchers used ultrasound to measure bone velocity in 40 pregnant women. Bone velocity was lower in the second and third trimesters, especially in women with low calcium intake. This indicates a drop in bone mass throughout pregnancy. The activity of tartrate-resistant acid phosphatase, which is a marker of bone remodeling, also increased in the third trimester.
Publication Name: American Journal of Obstetrics and Gynecology
Subject: Health
ISSN: 0002-9378
Year: 1998
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Changes in biochemical parameters of bone turnover and bone mineral density in post-pregnancy osteoporosis
Article Abstract:
The case of a woman with severe back pain caused by osteoporosis five months after pregnancy is discussed. Although a spinal X-ray showed no obvious deformity, MRI scans revealed weak areas in her lumbar spine. Increased blood levels of cross-linked carboxyterminal telopeptide of type I collagen and pyridinoline are confirmed the diagnosis of increased bone destruction.
Publication Name: American Journal of Obstetrics and Gynecology
Subject: Health
ISSN: 0002-9378
Year: 2001
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