What is Surgical Menopause?
… and how does hormone deficiency affect us? We break it down the facts about surgical menopause.
Kate Dyson
Authored By
Medically Reviewed By
Dr Deepali Misra-Sharp
Surgical menopause happens when both ovaries are removed – usually during a procedure called a bilateral salpingo-oophorectomy (BSO) or when their blood supply is interrupted during pelvic surgery. You might also have a ‘TAH BSO’, which stands for Total Abdominal Hysterectomy with Bilaterol Salpingo-Oopherectomy, or ‘radical hysterectomy’. The ovaries are your body’s main producers of oestrogen, progesterone, and testosterone, and these hormones influence almost every system: your bones, heart, brain, skin, joints, mood, and metabolism.
Surgical menopause has a specific medical definition. It happens when both ovaries are removed, known as a bilateral oophorectomy. This causes an abrupt loss of oestrogen, progesterone and testosterone, often within hours or days. There is no gradual transition. The body goes from hormone-producing to hormone-deprived almost overnight, which is why symptoms can feel sudden, intense and overwhelming.
When your ovaries are taken out, your hormone levels don’t fall gradually as they do in natural menopause; they drop immediately within the hours and days following your surgery. This is what makes surgical menopause so different – and intense. Your body, and particularly your brain, are suddenly deprived of hormones they rely on to function smoothly.
Many women experience symptoms similar to surgical menopause after gynaecological surgery, even when one or both ovaries are left in place. Surgery affecting the ovaries can lead to ovarian insufficiency, sometimes called surgical ovarian failure, due to disrupted blood supply or surgical trauma. Hormone levels can fall rapidly, and the symptoms can be just as severe. It may not meet the technical definition of surgical menopause, but the impact is often the same.
Understanding ‘surgical menopause’
The change is instant, and that means symptoms such as hot flushes, anxiety, joint pain and insomnia can appear within days.
Emotional and cognitive symptoms can be just as strong — many women describe feeling “wired”, tearful or detached from themselves. You might start to feel forgetful, fuzzy and like your memory is slipping.
Many women who have had their ovaries surgically removed say that they felt a bit rotten, pretty quickly. That’s not to say that there isn’t a sense of relief, or happiness that the surgery is over, and that the reason that you have had this operation isn’t valid.
What will happen inside my body?
Once your the ovaries are removed, the following changes immediately start to happen:
Oestrogen drops almost immediately, affecting temperature control, brain chemistry, bone turnover, and cardiovascular health.
Progesterone disappears completely, which can affect sleep and mood regulation.
Testosterone halves, reducing energy, libido, and cognitive sharpness.
This hormonal vacuum disrupts neurotransmitters like serotonin and dopamine, which explains the sudden mood shifts, anxiety, or brain fog that many women experience.
Without oestrogen, collagen production also slows, affecting joints, skin elasticity and bladder tissue.
If you enter surgical menopause before the age of 45 and are left untreated (aka, through hormone replacement therapy), then yes, your risk of long term health implications is higher. If you are unable to take HRT, it’s important to be aware of these long term health risks and discuss with your clinician and GP how your health will be managed in both the short, and long term.
These include:
Higher risk of cardiovascular disease
Accelerated bone loss and osteoporosis
Increased incidence of depression and anxiety
Earlier cognitive decline and dementia risk
Reduced sexual function and vaginal atrophy
These risks might be scary to read, we know. Fortunately, they are largely preventable with timely, adequate hormone replacement therapy (HRT) and ongoing lifestyle care. Studies from Mayo Clinic, BMJ, and the Royal College of Obstetricians and Gynaecologists consistently show that restoring hormones to natural levels until at least age 51 reduces the risk of long-term health outcomes.
Are there health implications I should know about?
Individualised care matters
There is no single “right” surgical menopause experience. The impact depends on your age, health, genetics, and access to post-operative care. Some women adjust quickly; others need time and ongoing hormone adjustment. The most important step is individualised treatment — replacing hormones thoughtfully, monitoring response, and supporting every aspect of recovery, from pelvic health to emotional wellbeing.