Pregnancy-Related (Transient) Osteoporosis

Understanding Bone Health During and After Pregnancy

Pregnancy causes significant physical and hormonal changes of the body. In some rare cases, pregnancy can lead to unexpected challenges such as pregnancy-related osteoporosis. Also known as transient osteoporosis, this is a condition involving temporary but significant bone loss during or after pregnancy.

This uncommon disorder can cause sudden back or hip pain, reduced mobility, and the possibility of fractures. Early recognition is vital to managing transient osteoporosis to prevent fractures and further injury. Concerns of back and hip pain during pregnancy should be assessed by a women’s health physiotherapist to determine the cause of pain and to begin appropriate treatment. At Sydney Physio Clinic we offer treatment and management of injuries and pain during and after pregnancy.

What Is Pregnancy-Related Osteoporosis?

Pregnancy-related osteoporosis usually develops in the third trimester or early after childbirth. It occurs when bone mineral density decreases more than expected, occasionally leading to spinal or hip fractures with minimal trauma.

Symptoms often appear suddenly and can include persistent back or hip pain after giving birth, pain that worsens when standing or walking, or a noticeable change in posture. Because back and hip discomfort is common during and after pregnancy, this condition may go undiagnosed without appropriate assessment and imaging.

Sometimes when pregnancy-related osteoporosis is present, people will notice changes in their teeth such as decay, or teeth becoming brittle.

Causes and Contributing Factors

The precise cause of pregnancy-related, transient osteoporosis is not fully understood, but several factors may play a role:

• Hormonal changes – Pregnancy alters calcium metabolism and bone turnover.
• Increased calcium demand – The developing baby draws calcium from the mother’s stores, particularly in the third trimester and during breastfeeding.
• Nutritional factors – Low dietary intake of calcium or vitamin D can reduce bone strength.
• Pre-existing low bone density – A history of amenorrhea, eating disorders, or family predisposition increases risk.
• Medication use – Long-term corticosteroid or heparin use can influence bone metabolism.
• Genetic and metabolic influences – Certain genetic factors may affect bone turnover and recovery.

Most women regain normal bone density after either delivery or breast-feeding is complete, but the initial period can be painful and functionally limiting, making early physiotherapy support invaluable.

Bone Loss During Breastfeeding

During lactation, the body naturally releases calcium from the bones to supply breast milk. This process can cause a temporary decrease of up to 5–10% in bone mineral density within the first six months of breastfeeding, particularly in the spine and hips.

Fortunately, this loss is reversible. Most women regain bone density within six to twelve months after weaning. However, for those who start pregnancy with low bone mass or experience closely spaced pregnancies, this natural bone turnover may become more clinically significant.

For women recovering from pregnancy-related osteoporosis, gentle weight-bearing exercise and adequate calcium and vitamin D intake are crucial for bone restoration. A women’s health physio can design a safe and progressive rehabilitation program tailored to your stage of recovery and medical clearance.

Diagnosis and Medical Assessment

Diagnosis typically involves several steps, often in collaboration with a multidisciplinary team:

• X-ray or MRI if spinal or hip fractures are suspected.
• DEXA scans to measure bone mineral density.
• Blood tests to assess calcium, vitamin D, and hormone levels.

A combined approach between your obstetrician, endocrinologist, and women’s health physiotherapist ensures accurate diagnosis and safe, coordinated care to prevent further injury.

Physiotherapy and Recovery

Physiotherapy is central to managing osteoporosis during and after pregnancy. At Sydney Physio Clinic, our women’s health physio can assess hip and back pain during pregnancy to create a personalised program for safe and effective recovery and pain management. Treatment will depend on the severity of bone density loss and whether any fractures are present.

Pain Management and Postural Support

Early treatment of transient osteoporosis prioritises reducing pain and protecting vulnerable areas. Education about posture, safe lifting, and daily movements helps to minimise further injury. Supportive braces may help to relieve discomfort in the short-term. Water-based movement and exercise may be beneficial to recovery.

Progressive Strengthening

Pregnancy and childbirth can affect the core and pelvic floor muscles. Physiotherapists use

gentle activation exercises to stabilise the spine and pelvis, improve posture, and reduce stress on the back.

As healing progresses, strengthening the hips, glutes, and back muscles is important. Low-impact, weight-bearing activities such as walking, hydrotherapy, and light resistance training helps rebuild bone density while maintaining joint safety.

Functional Movement and Balance

Re-training movement patterns and functional habits for lifting, bending, and caring for your baby can help to restore confidence and prevent injury. Balance and coordination exercises further enhance safety and reduce fall risk.

Education for Long-Term Bone Health

Maintaining calcium-rich foods, vitamin D exposure, and safe physical activity supports bone recovery and long-term strength. Your physiotherapist or obstetrician may recommend consultation with a dietician for specialist nutrition advice. A good balance between safe physical activity and appropriate nutrition is important for long-term recovery.

Long-Term Outlook

Most women recover completely from pregnancy-related osteoporosis and regain normal bone density. Ongoing physiotherapy and healthy lifestyle habits support continued improvement and reduce the chance of recurrent issues in future pregnancies.

For those considering another pregnancy, early assessment, and proactive management, including appropriate diet, exercise, and follow-up imaging are strongly advised.

Why Choose a Women’s Health Physio?

A women’s health physio understands the complex musculoskeletal and hormonal changes that occur during pregnancy, breastfeeding, and recovery.

At Sydney Physio Clinic, our women’s health physiotherapist provides programs to manage postpartum bone changes, back pain, and strength deficits. We also create evidence-based, personalised programs for safe exercise during pregnancy. With expert guidance, education, and reassurance, women can return to full function safely and confidently.