The United Nations refugee agency says the Australian government has sent a second pregnant asylum seeker to Nauru's immigration detention centre.
The UNHCR says a 30-year-old woman is seven months pregnant with twins and is in detention along with her husband and two children.
An Iranian asylum seeker, aged 22, who is pregnant is also being detained on Nauru.
The Immigration Minister Scott Morrison earlier said Nauru's hospital had a maternity wing with two delivery beds, six post-natal beds and a special-care baby unit.
The President of the Australian Medical Association, Steven Hambleton, has called on the government to allow independent medical experts to inspect health facilities for asylum seekers on Nauru and the second processing centre on Manus Island in Papua New Guinea.
