She was born in Waipawa, Hawke's Bay, New Zealand on 18 March 1887.
Aves ran an abortion business from her home in Napier using sea-tangle tents (probably Laminaria digitata seaweed stalks or a local substitute) which, when inserted into the cervical canal, absorbed water and slowly expanded, dilating the cervix.Her first trial was in Napier on a charge of "unlawfully using an instrument with intent to procure a miscarriage", but the jury could not agree on a verdict.
Two further trials were held in Wellington, with the juries again failing to agree on a verdict, amid much publicity.
An unusual fourth trial followed, which also resulted in no conviction.
Aves was represented by Cyril Harker at the trials in Napier in August 1936, Wellington in October 1936, December 1936 and February 1937.
Harker defended Hercock, getting him off on the lesser charge of manslaughter rather than murder and subsequently getting his prison term reduced.
The judge in Hercocks' trial was Michael Myers, who had presided over Aves's last trial, during the trial he said if [Annie Aves] had been dealt with as she should have been, this tragedy would not have happened.