Mariam Mathew1, Anita K Mohan, Poovathoor C Jacob. 1. Department of Obstetrics and Gynecology, Sultan Qaboos University Hospital, PO Box 38, PC 123, Al-Khoud, Muscat, Sultanate of Oman. Tel. +968 24413951. Fax. +968 24413951. E-mail: mathewz@omantel.net.om.