Okeke, T. C., Ubaka, A. A., Olibe, A. O., Okeke, K. O., Odoh, G. U., Ezenyeaku, C. C., Ikeako, L. C., Izuka, E. O. and Onwuka, C. I. (2017) “Successful quadruplet surrogate pregnancy after turbulent medical disorders in first trimester”, International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 6(5), pp. 2090–2094. doi: 10.18203/2320-1770.ijrcog20171982.