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Gynecologic and Obstetric Investigation|January 1, 1989
Amniotic fluid selenium status in pre-eclampsiaA C Roy, S S Ratnam, R KarunanithyAdvances in Contraception : the Official Journal of the Society for the Advancement of Contraception|March 1, 1990
A three-year evaluation of hemostatic function in Singaporean Norplant acceptorsK Singh, O A Viegas, S S RatnamSingapore Medical Journal|December 1, 1990
Norplant contraceptive implants--a comparison of capsules versus rods in SingaporeK Singh, O A Viegas, S S RatnamBritish Journal of Obstetrics and Gynaecology|November 1, 1976
Plasma levels of oestriol-17 beta, oestriol and human placental lactogen during bed restP C Chew, H Mok, S S RatnamAdvances in Contraception : the Official Journal of the Society for the Advancement of Contraception|September 1, 1993
Evaluation of hemostatic function following Norplant-2 rods removalK Singh, O A Viegas, S S RatnamFertility and Sterility|December 1, 1991
Microinjection of human oocytes: a technique for severe oligoasthenoteratozoospermiaS C Ng, A Bongso, S S RatnamContraception|April 1, 1989
Effects of three types of combined O.C. pills on blood coagulation, fibrinolysis and platelet functionR N Prasad, S Koh, S S RatnamContraception|May 1, 1980
Effects of oral contraceptives containing 50 microgram estrogen on blood coagulation in non-Caucasian womenF H Tsakok, S Koh, S S RatnamAnnals of the Academy of Medicine, Singapore|November 1, 1990
A comparison of the effects of NORPLANT capsules and NORPLANT-2 rods on clinical chemistry: metabolic changesK Singh, O A Viegas, S S RatnamInternational Journal of Gynaecology and Obstetrics: the Official Organ of the International Federation of Gynaecology and Obstetrics|January 1, 1977
Alternatives to female sterilizationS S Ratnam, M Rauff, S C ChewPageof 116