1. 1. Mendelson CL: Multiple pregnancy. In Obstetrics. Asian ed. 13th ed (Greenhill JP, ed), 1965; pp 617-630, Igaku Shoin, Tokyo & Osaka.
2. 2. Cunningham FG, Leveno KJ, Bloom SL, Hauth JC, Gilstrap L, Wenstrom KD: Multifetal gestation. In Williams Obstetrics. 22nd ed (Cunningham FG, Leveno KJ, Bloom SL, Hauth JC, Gilstrap L, Wenstrom KD, eds), 2005; pp 911-943, McGraw Hill, New York.
3. Reestimating date of delivery in multifetal pregnancies
4. Postpartum Hemorrhage After Vaginal Birth: An Analysis of Risk Factors
5. Obstetric risk factors and outcome of pregnancies complicated with early postpartum hemorrhage: A population-based study