M. Bremme

Effectiveness and acceptibility of the symptothermal method of natural family planning in Germany.

E. Godehardt, G. Freundl, P. Frank-Herrmann, 1991, American journal of obstetrics and gynecology.

The CUE Fertility Monitor compared to ultrasound and LH peak measurements for fertile time ovulation detection

E. Godehardt, G. Freundl, G. Freundl, 1996, Advances in contraception : the official journal of the Society for the Advancement of Contraception.

Research and quality control in natural family planning with relational database systems

C. Gnoth, E. Godehardt, G. Freundl, 1999, Advances in contraception : the official journal of the Society for the Advancement of Contraception.

[How do self-observed cycle symptoms correlate with ovulation?].

C. Gnoth, E. Godehardt, G. Freundl, 1996, Zentralblatt fur Gynakologie.

[Has family planning behavior in West Germany changed since 1985?].

E. Godehardt, G. Freundl, P. Frank-Herrmann, 1991, Geburtshilfe und Frauenheilkunde.

Results of an Efficacy-Finding Study (EFS) with the Computer-Thermometer Cyclotest 2 Plus Containing 207 Cycles

G. Freundl, P. Frank-Herrmann, M. Bremme, 1998, Advances in contraception : the official journal of the Society for the Advancement of Contraception.