Estrogen Deficiency After Bilateral Oophorectomy in Postmenopausal Women

Immediate to Short-Term Effects

Hot flashes are unlikely to develop de novo in a woman who has been postmenopausal for years without symptoms, as the hypothalamic thermoregulatory center has already adapted to low estrogen levels, according to the American College of Obstetricians and Gynecologists 1, 2
Over 90% of women undergoing bilateral oophorectomy before natural menopause experience hot flashes, but this risk is substantially lower in women already postmenopausal, as stated by the American College of Obstetricians and Gynecologists 1
Vaginal atrophy symptoms worsen or emerge within 3-6 months as the small amount of residual ovarian estrogen is suddenly eliminated, causing symptoms such as vaginal dryness, discomfort, pruritis, dyspareunia, urinary tract infections, and urinary urgency, according to the American College of Obstetricians and Gynecologists 1, 2

Sexual dysfunction affects at least 50% of women after bilateral oophorectomy, with symptoms becoming apparent within 3-6 months, including decreased vaginal lubrication, reduced genital sensation, difficulty with orgasm, and decreased libido, as reported by the American College of Obstetricians and Gynecologists 1, 2

The American College of Obstetricians and Gynecologists recommends that HRT should be strongly considered even in asymptomatic postmenopausal women undergoing bilateral oophorectomy to prevent accelerated bone loss, cardiovascular disease, and cognitive decline, with estrogen-only therapy being appropriate since the uterus may or may not be present 3, 4
17-β estradiol is preferred over conjugated equine estrogens or ethinylestradiol, according to the American College of Obstetricians and Gynecologists 3, 4
Transdermal estradiol is preferred, particularly in women with hypertension or cardiovascular risk factors, as stated by the American College of Cardiology 3, 4
For isolated vaginal symptoms, low-dose vaginal estrogen can be considered, according to the American College of Obstetricians and Gynecologists 2

Clinical review annually with attention to compliance, assessment of vasomotor symptoms, vaginal atrophy, sexual function, and bone health, as recommended by the American College of Obstetricians and Gynecologists 3, 2
No routine hormone level monitoring is required unless symptoms suggest inadequate replacement, according to the American College of Obstetricians and Gynecologists 3, 4