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Seminars in Reproductive Medicine|December 1, 2001
Progestin-releasing intrauterine systemsT Luukkainen, P Pakarinen, J Toivonen
Seminars in Reproductive Medicine|December 1, 2001
Therapeutic use of the LNG IUS, and counselingP Pakarinen, J Toivonen, T Luukkainen
Contraception|September 1, 1978
Pituitary and gonadal function during the use of norgestrelestradiol vaginal ringsJ Toivonen, P Lähteenmäki, T Luukkainen
Annals of Medicine|April 1, 1990
Levonorgestrel-releasing intrauterine deviceT Luukkainen, P Lähteenmäki, J Toivonen
Contraception|April 1, 1979
The use of a contraceptive vaginal ring governed by the pattern of individual uterine bleedingJ Toivonen, P Lähteenmäki, T Luukkainen
Contraception|May 1, 1981
Intracervical release of levonorgestrel for contraceptionH Kurunmäki, J Toivonen, P Lähteenmäki, et al.
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