Ovarian cancer kills thousands of people every year in the UK, but most women don't know its main symptoms, a charity warned.
Despite being the sixth most common cause of cancer deaths in the UK, many people haven't heard of it.
In a poll of 1,000 women, conducted for Target Ovarian Cancer, almost all were unaware that feeling full and needing to urinate more urgently are symptoms.
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More than two thirds didn't know abdominal pain is a sign, and 79% were unaware bloating is a symptom.
Annwen Jones, chief executive of Target Ovarian Cancer, said: "These figures are incredibly disappointing.
"We know we've shifted the dial in the past 10 years through the dedication of thousands of Target Ovarian Cancer's campaigners, but it is not enough.
"Knowing the symptoms is crucial for everyone. We need to make sustained and large-scale Government-backed symptoms campaigns a reality.
"Progress is possible. If we do this, fewer people will be diagnosed late, fewer will need invasive treatment, and, ultimately, fewer will die needlessly from ovarian cancer."
A third of people with ovarian cancer die within a year of their diagnosis, while more than 35% live longer than 10 years.
Ovarian cancer is often diagnosed in the late stages when it may be incurable but treatable.
Two thirds of women surveyed wrongly believed cervical screening checks for ovarian cancer.
Ruth Betteridge, from Huyton, had never heard of ovarian cancer until she was diagnosed with it aged 29.
She told the ECHO: "I was bloated and my stomach was looking like I was six months pregnant. That was what made me go [to the GP] in the end.
"I'd gone, 'Oh maybe it's fizzy drinks, maybe it's that that's making me like this'.
"I stopped eating bread and things like that, but literally, whatever I ate, I was bloated all the time. It never went down.
"And then I could only manage about three bites of a meal, and I was full straight away."
Dr Danielle Shaw, a consultant in medical oncology at The Clatterbridge Cancer Centre NHS Foundation Trust, said: "Ovarian cancer has few symptoms so it is often discovered late, making it difficult to cure completely.
"However, there are some incredible advancements in treatment for people with ovarian cancer which are meaning people are living longer with this type of cancer."
Ovarian Cancer Awareness Month starts on Tuesday, March 1.
Target Ovarian Cancer urged women to sign open letters to the Government by visiting https://campaign.targetovariancancer.org.uk/page/97923/petition/1
