While most of the aging-related differences you’ll notice in your lady parts (like an increase in dryness and yeast infections) are just simply annoying, others can be serious.
Your body changes the older you get and your vagina is no exemption. There are a few things that happen to your vagina the older you get.
Your uterus can fall into your vagina
Yes, this actually can happen. There is a condition that occurs which is called prolapse (a.k.a. the dropping of the uterus, bladder, or rectum into the vagina). This can happen as you get older.
Your vagina looks older
Naturally, your skin loses elasticity when you age and wrinkles become obvious. This also affects your vagina. There is a loss of elasticity in your vagina known as vulvo-vaginal atrophy, or VVR. The vaginal walls thin out and can become dry and inflamed.
The entrance to your vagina can shrink
The uterus can easily change size as women get older and estrogen levels drop. As women get older, the uterus itself tends to get smaller. The vaginal entrance can narrow with age. This narrowing can lead to irritation, dryness, and sometimes, inflammation of the vaginal wall – a condition called atrophic vaginitis. Left untreated, atrophic vaginitis can cause bleeding and painful sex and pelvic exams. That being said, maintaining a certain level of sexual activity can offset help.
You lose bladder control
As time goes on, musculature and ligaments supporting the pelvic floor start to relax. In some cases, the urethra may actually move in relation to the bladder, which can cause leaking.
You are more susceptible to UTIs
UTIs may become more frequent when you’re older due to more delicate genital tissue. This can actually cause behavioral changes, such as confusion. Small micro-abrasions can also occur and lead to bladder infection. Women may experience UTI symptoms (irritation, increased frequency of urination, burning with urination) simply due to decreased hormone levels and inelasticity without having an actual infection. In that case, estrogen therapy is an option.

What about penis shrinkage associated with old age?