Australian women are spending more than $10,000 on trips to Thailand to select the sex of their new babies through in-vitro fertilization.
Desperate to choose the gender of their children, they are prepared to flout Australian bans outlawing the "family balancing" practice.
Thai IVF centers confirmed they were treating Australian women with the controversial procedure.
A group of Victorian women flooded a Web forum to discuss their sex selection experiences and help others.
The women have also told of their dealings with helpful Victoria, Australia IVF doctors.
But Melbourne clinics contacted by the Herald Sun denied they have helped anyone pursue sex selection overseas.
One woman wrote of contemplating an abortion after finding out she was having a boy. She had already aborted one boy and felt "cheated" that her only living child was a boy.
Sex selection for non-medical reasons is illegal in Victoria and forbidden in other states after the Australian Health Ethics Committee ruled against it in 2004.
Thailand's Medical Council also advises against sex selection — also known as preimplantation genetic diagnosis — for family planning.
But several Thai clinics offer the service as a cheaper alternative to the U.S., where sex selection is allowed.
The American College of Obstetricians and Gynecologists and the American Society of Reproductive Medicine say assisting patients in choosing the sex of their offspring to avoid serious sex-linked genetic disorders is ethical, but they discourage sex selection for personal and family reasons, such as family balancing.
Nevertheless, while many countries prohibit sex selection techniques without a medical purpose, the United States does not.
The Associated Press contributed to this report.