The pelvic floor is a group of muscles and ligaments that support the bladder, uterus (womb) and bowel.
The openings from these organs, the urethra from the bladder, the vagina from the uterus and the anus from the bowel pass through the pelvic floor. The pelvic floor muscles attach to your pubic bone at the front and the tail bone at the back and from the base of your pelvis.
What do the pelvic floor muscles do? When the pelvic floor is strong, it supports the pelvic organs to prevent problems such as: incontinence (the involuntary loss of urine or faeces) prolapse (lack of support) of the bladder, uterus and bowel. The pelvic floor muscles also help you to control bladder and bowel function, such as allowing you to 'hold on' until an appropriate time and place. anatomy of the pelvic floor
What causes pelvic floor muscle weakness? Some of the common causes of pelvic floor muscle weakness are: childbirth – particularly following delivery of a large baby or prolonged pushing during delivery, being overweight, constipation (excessive straining to empty your bowel), persistent heavy lifting, excessive coughing – causing repetitive straining, changes in hormonal levels at menopause, growing older.
Weak pelvic floor muscles can cause:
Bladder weakness
Incontinence
Prolapse
Lack of sexual pleasure
Pelvic pain
In this video I share my personal story 
https://youtu.be/wnSJNrMt_uk