The causes of pelvic floor muscle laxity without having had a baby may include aging, increased abdominal pressure factors such as chronic coughing, and medical factors. 1. Aging: the atrophy of supporting structures with age, especially after menopause, can cause the onset and development of pelvic floor laxity. 2. Increased abdominal pressure factors: Long-term and frequent increases in abdominal pressure can also lead to pelvic floor muscle relaxation. Common factors include chronic cough, abdominal fluid retention, abdominal obesity, constant weight bearing or constipation. 3. Medical factors: Surgery that does not adequately correct the resulting defects in the pelvic floor support structures may also lead to pelvic floor laxity. If there is any discomfort, it is recommended to seek prompt medical advice and consultation.