Cole JA, Norman H, Doherty M, Walker AM (February 2007). "Venous thromboembolism, myocardial infarction, and stroke among transdermal contraceptive system users". Obstetrics and Gynecology. 109 (2 Pt 1): 339–346. doi:10.1097/01.AOG.0000250968.82370.04. PMID17267834. S2CID1572286.
Jick S, Kaye JA, Li L, Jick H (July 2007). "Further results on the risk of nonfatal venous thromboembolism in users of the contraceptive transdermal patch compared to users of oral contraceptives containing norgestimate and 35 microg of ethinyl estradiol". Contraception. 76 (1): 4–7. doi:10.1016/j.contraception.2007.03.003. PMID17586129.
Stewart FH, Kaunitz AM, Laguardia KD, Karvois DL, Fisher AC, Friedman AJ (June 2005). "Extended use of transdermal norelgestromin/ethinyl estradiol: a randomized trial". Obstetrics and Gynecology. 105 (6): 1389–1396. doi:10.1097/01.AOG.0000160430.61799.f6. PMID15932834. S2CID8831803.
Rivera R, Yacobson I, Grimes D (November 1999). "The mechanism of action of hormonal contraceptives and intrauterine contraceptive devices". American Journal of Obstetrics and Gynecology. 181 (5 Pt 1): 1263–1269. doi:10.1016/S0002-9378(99)70120-1. PMID10561657.
Cole JA, Norman H, Doherty M, Walker AM (February 2007). "Venous thromboembolism, myocardial infarction, and stroke among transdermal contraceptive system users". Obstetrics and Gynecology. 109 (2 Pt 1): 339–346. doi:10.1097/01.AOG.0000250968.82370.04. PMID17267834. S2CID1572286.
Jick S, Kaye JA, Li L, Jick H (July 2007). "Further results on the risk of nonfatal venous thromboembolism in users of the contraceptive transdermal patch compared to users of oral contraceptives containing norgestimate and 35 microg of ethinyl estradiol". Contraception. 76 (1): 4–7. doi:10.1016/j.contraception.2007.03.003. PMID17586129.
Stewart FH, Kaunitz AM, Laguardia KD, Karvois DL, Fisher AC, Friedman AJ (June 2005). "Extended use of transdermal norelgestromin/ethinyl estradiol: a randomized trial". Obstetrics and Gynecology. 105 (6): 1389–1396. doi:10.1097/01.AOG.0000160430.61799.f6. PMID15932834. S2CID8831803.
Rivera R, Yacobson I, Grimes D (November 1999). "The mechanism of action of hormonal contraceptives and intrauterine contraceptive devices". American Journal of Obstetrics and Gynecology. 181 (5 Pt 1): 1263–1269. doi:10.1016/S0002-9378(99)70120-1. PMID10561657.
Cole JA, Norman H, Doherty M, Walker AM (February 2007). "Venous thromboembolism, myocardial infarction, and stroke among transdermal contraceptive system users". Obstetrics and Gynecology. 109 (2 Pt 1): 339–346. doi:10.1097/01.AOG.0000250968.82370.04. PMID17267834. S2CID1572286.