Scientific publications on trackle and the symptothermal method.
As a Class IIb medical device, we at trackle are obligated to regularly demonstrate the functionality and safety of trackle through studies. Additionally, we closely monitor scientific publications within the community to ensure that we stay informed of all news and insights, remaining up-to-date with the latest research.
Relevant studies in the German-speaking region can be found, for example, in the ‚German Register of Clinical Trials.‘
Here, one of the first studies on trackle is summarized and published.
We consider the following studies to be particularly relevant in the field of „Hormone-Free Contraception“:
- Frank-Herrmann P, Freundl G, Gnoth C, Godehardt E, Kunert J, Baur S, Sottong U (1997) Natural family planning with and without barrier method use in the fertile phase: efficacy in relation to sexual behaviour: a German prospective long-term study. Advances in Contraception 13(2-3): S.179-189.
- Frank-Herrmann P, Heil J, Gnoth C et al. (2007) The effectiveness of a fertility awareness based method to avoid pregnancy in relation to a couple’s sexual behaviour during the fertile time: A prospective longitudinal study. Human Reproduction 22(5): S.1310-1319.
- Urrutia, R.P., Polis, C.B., Jensen, E.T., Greene, M.E., Kennedy, E., and Stanford, J.B. (2018). Effectiveness of fertility awareness-based methods for pregnancy prevention: A systematic review. Obstetrics and Gynecology S.132, 591–604.
- Freundl, Günter; Bremme, Michael; Frank-Herrmann, Petra; Baur, Siegfried; Sottong, Ursula: Methoden- und Gebrauchssicherheit der symptothermalen Methode der natürlichen Familienplanung: Prospektive Studie mit inzwischen 10649 Zyklen (1993), Archives of Gynecology and Obstetrics S. 254: 281-285.
- Freundl G, Sivin I, Batár I (2010) State-of-the-art of non-hormonal methods of contraception: IV. Natural family planning. The European Journal of Contraception and Reproductive Health Care 15: S. 113-123.
- Frank-Herrmann P, Gnoth C, Baur S, Strowitzki T, Freundl G (2005). Determination of the fertile window: Reproductive competence of women – European cycle databases. Gynecological Endocrinology 20: S. 305–312.
- Gnoth, Christian; Frank-Herrmann, Petra; Schmoll, A.; Godehardt, Erhard; Freundl, Günter: Cycle characteristics after discontinuation of oral contraceptives, in: Gynecological Endocrinology (2002), Vol. 16, S. 307-317.
- Duane M, Stanford JB, Porucznik CA, Vigil P. Fertility Awareness-Based Methods for Women’s Health and Family Planning. Front Med (Lausanne). 2022 May 24;9:858977. doi: 10.3389/fmed.2022.858977. PMID: 35685421; PMCID: PMC9171018.
- Peters A, Mahdy H. Symptothermal Contraception. [Updated 2022 Nov 7]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022.
- Sung S, Abramovitz A. Natural Family Planning. 2022 Jul 25. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022. PMID: 31536267
- Natural Family Planning, An Option in Reproductive Healthcare: A Qualitative Study on Clinicians‘ Perceptions. Joan Ibeziako O. Linacre Q. 2022 Aug;89(3):S.298-318. doi: 10.1177/00243639221078070. Epub 2022 Mar 27. PMID 35875372.
These studies are considered particularly relevant in the field of „Pregnancy Planning“:
- Freundl, G., Godehardt, E., Kern, P. A., Frank-Herrmann, P., Koubenec, H. J., & Gnoth, C. (2003). Estimated maximum failure rates of cycle monitors using daily conception probabilities in the menstrual cycle. Human Reproduction, 18(12), S.2628–2633.
- Elisabeth Raith-Paula; Günter Freundl; Petra Frank-Herrmann; Thomas Strowitzki; Ursula Sottong. Natürliche Familienplanung heute: Modernes Zykluswissen für Beratung und Anwendung (German Edition). Springer. Kindle-Version. 6. Auflage 2020.
- Natürlich und sicher: Natürliche Familienplanung mit Sensiplan. Das Praxisbuch, Taschenbuch. TRI. Juni 2021.
- Natürlich und sicher Das Arbeitsheft: Mit Zyklusbeispielen von Pubertät bis Wechseljahr. TRIAS.Feb 2012.
- Frank-Herrmann P, Baur S, Freundl G, Gnoth C, Rabe T, Strowitzky T (2015) Natürliche Familienplanung – aktueller Stand. Gynäkologe 48(9): S. 657-666.
- Gnoth, Christian; Godehardt, Doris; Godehardt, Erhard; Frank-Herrmann, Petra; Freundl, Günter: Time to pregnancy: results of the German prospective study and impact on the management of infertility, in: Human Reproduction (2003), Vol. 18, No. 9, S.1959-1966.
- P. Frank-Herrmann; C. Jacobs; E. Jenetzky; C. Gnoth; C. Pyper; S. Baur; G. Freundl; M. Goeckenjan; T. Strowitzki: Natural conception rates in subfertile couples following fertility awareness training, in: Arch Gynecol Obstet (2017) S. 295: 1015.
- Wilcox AJ, Weinberg CR, Baird DD. Timing of sexual intercourse in relation to ovulation. Effects on the probability of conception, survival of the pregnancy, and sex of the baby. N Engl J Med. 1995 Dec 7;333(23): S.1517-21. doi: 10.1056/NEJM199512073332301. PMID: 7477165.
- Frank-Herrmann P, Gnoth C, Baur S, Strowitzki T, Freundl G (2005). Determination of the fertile window: Reproductive competence of women – European cycle databases. Gynecological Endocrinology 20: S.305–312.