The review team had been expected to produce an interim report before Christmas but this deadline is unlikely to be met. Sabaratnam Arulkumaran, a Sri Lanka-born expert on maternal care from the University of London, is heading the clinical review team.
Savita (31), who was 17 weeks pregnant, died of septicaemia at University Hospital Galway following a miscarriage on October 28.
Meanwhile, four of the six members of the investigation team, appointed by the Health Information and Quality Authority (HIQA) to examine her hospital care are from outside the State.
It also includes Dr Nuala Lucas, an anaesthetist in Northwick Park Hospital in Harrow in the UK and Dr Bharat Patel, a microbiologist at the Health Protection Agency also in the UK.
The other experts are Dr Robert Cunney, a microbiologist at the Health Protection Surveillance Centre in Dublin and Lorreta Evans, a patient safety champion, whose son died in a Dublin hospital in 2005.
An inquiry resulted in a new handover policy between doctors changing shifts.
HIQA's report is expected not to be ready until well into next year. Savita's husband Praveen has said he will not co-operate with the investigation. He is also not co-operating with the clinical review and is to go the European Court of Human Rights in his bid to secure a public sworn inquiry.