A major data breach at Family Planning NSW has potentially exposed the personal information of thousands of people who have booked abortions or sought contraceptive information through the clinic.
It is estimated that as many as 8,000 clients may be affected by the hack.
The breach took place over two weeks ago, with a bitcoin attack on ANZAC Day leaving information vulnerable.
Clients of the clinic have been notified by email, signed by chairwoman of the FPNSW board Sue Carrick and chief executive Adjunct Professor Ann Brassil.
"These databases contained information from around 8,000 clients who had contacted Family Planning NSW through our website in the past 2 1/2 years, seeking appointments or leaving feedback," the email read.
"Since the attack we have had no evidence that this information has been used by the cyber attackers."
The site has undergone a security upgrade today, according to ABC News.
It does not appear as though the information has been used.
There are five FPNSW clinics around Sydney, which provide sexual health and reproductive services.