Gnoth, Christian http://orcid.org/0000-0001-6329-4075
Keil, Ann-Kristin
Schiffner, Julia
Heil, Sylvia
Mallmann, Peter
Freundl, Günter
Strowitzki, Thomas
Article History
Received: 18 November 2019
Accepted: 13 February 2020
First Online: 5 March 2020
Compliance with ethical standards
:
: Christian Gnoth is a principal investigator of clinical trials for the development and evaluation of fertility monitors and receives support from SPD Development Company, Bedfort, UK. No conflicts of interest of the other authors.
: Ethical approval was obtained by the Section of Natural Fertility of the German Society of Gynecological Endocrinology and Fertility Medicine at the University of Heidelberg. The study was conducted in accordance with the ethical principles of the Declaration of Helsinki of 1964 and its later amendments.
: All participants have signed informed consents and agreed in using their anonymized data for scientific purposes. All participants were free to withdraw at any time.