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Contraception|February 1, 1989
Plasma levonorgestrel levels and ovarian function during the use of a levonorgestrel-releasing intracervical contraceptive deviceK Ratsula, J Toivonen, P Lähteenmäki, et al.Contraception|May 1, 1984
Intracervical release of ST-1435 for contraceptionH Kurunmäki, J Toivonen, P L Lähteenmäki, et al.Contraception|November 1, 1984
Immediate postabortal contraception with Norplant: levonorgestrel, gonadotropin, estradiol, and progesterone levels over two postabortal months and return of fertility after removal of Norplant capsulesH Kurunmäki, J Toivonen, P L Lähteenmäki, et al.Contraception|January 1, 1984
Pituitary and ovarian function and clinical performance during the use of a levonorgestrel-releasing intracervical contraceptive deviceH Kurunmäki, J Toivonen, P L Lähteenmäki, et al.Contraception|October 1, 1984
Pharmacokinetic observations on ST-1435 administered subcutaneously and intravaginallyP L Lähteenmäki, H Kurunmäki, P Lähteenmäki, et al.Contraception|February 1, 1986
Five years' experience with levonorgestrel-releasing IUDsT Luukkainen, H Allonen, M Haukkamaa, et al.Contraception|January 1, 1989
Acceptability of an experimental intracervical device: results of a study controlling for selection biasR N Shain, K Ratsula, J Toivonen, et al.Fertility and Sterility|September 1, 1980
Return of ovulation after abortion and after discontinuation of oral contraceptivesP Lähteenmäki, P Ylöstalo, S Sipinen, et al.Acta Obstetricia Et Gynecologica Scandinavica|April 1, 1992
Contraception after thirty-fiveT LuukkainenPageof 13