Research & Publications

Publications and clinical findings ran by medical experts and peer reviewed by the scientific community.

Peer-reviewed Publications Conference Abstracts and Scientific Presentations

Peer-reviewed Publications

Longitudinal changes in sexual desire and attraction among women who started using the Natural Cycles app

Gassen J., et al (2024), Hormones and Behavior

Time to pregnancy recognition among users of an FDA Cleared fertility application

van Lamsweerde A., et al (2024), Journal of Obstetrics and Gynaecology

Timing of coronavirus disease 2019 (COVID-19) vaccination and effects on menstrual cycle changes

Edelman A., et al (2024), Obstet Gynecol.

The menstrual cycle is influenced by weekly and lunar rhythms

Ecochard, R. et al (2024), Fertility and Sterility

Analyzing user reviews of the first digital contraceptive: Mixed methods study

Ciolfi Felice, M. et al, 2023. J Med Internet Res.

A multi-site study of the relationship between photoperiod and ovulation rate using Natural Cycles data

Shanmugam, D. et al (2023) Nature scientific reports

Impact of coronavirus disease 2019 (COVID-19) vaccination on menstrual bleeding quantity: An observational cohort study

Darney B, et al (2023) BJOG

Association between menstrual cycle length and covid-19 vaccination: Global, retrospective cohort study of prospectively collected data

Edelman, A. et al (2022), bmjmedicine

Association between menstrual cycle length and coronavirus disease 2019 (COVID-19) vaccination

Edelman, a. et al (2021), Obstet. Gynecol.

Detecting variations in ovulation and menstruation during the COVID-19 pandemic, using real-world mobile app data

Nguyen BT. et al (2021) PLOS ONE

Time to pregnancy for women using a fertility awareness based mobile application to plan a pregnancy

Favaro, C. et al. (2021), J Women's Health

Natural Cycles app: Contraceptive outcomes and demographic analysis of UK users

Pearson, J. et al (2021), Eur J Contracep Repr

(Not) talking about fertility: The role of digital technologies and health services in helping plan pregnancy. A qualitative study

French, R. et al. (2020) BMJ Sex. Reprod. Health

Fertility and digital technology: narratives of using smartphone app ‘Natural Cycles’ while trying to conceive

Grenfell, P. et al. (2020) Sociol. Health Illn.

Contraceptive effectiveness of an FDA Cleared birth control app: Results from the Natural Cycles U.S. cohort

Pearson, J. et al (2021), J Women's Health

Advantages of determining the fertile window with the individualised Natural Cycles algorithm over calendar-based methods

Kleinschmidt, T. et al. (2019), Eur J Contracep Repr

Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles

Bull, J. et al. (2019), npj Digital Medicine

Short- and long-term effect of contraceptive methods on fecundity

Berglund Scherwitzl, E. et al. (2019), Eur J Contracep Repr

Investigating the impact of previous contraceptive choice on unintended pregnancy risk

Bull, J. et al. (2019), BMJ Open

Contraceptive effectiveness of the Natural Cycles app involving 22,785 women

Berglund Scherwitzl, E. et al. (2017), Contraception

Pilot effectiveness study of Natural Cycles for pregnancy prevention

Berglund Scherwitzl, E. et al. (2016), Eur J Contracep Repr

Identification and prediction of the fertile window using Natural Cycles

Berglund Scherwitzl, E. et al. (2015), Eur J Contracep Repr

Conference Abstracts and Scientific Presentations

Postpartum and Birth Experiences of Women using an FDA cleared birth control app

van Lamsweerde, A. et al (2023) ESG, Amsterdam

Shared Responsibility in Digital Birth Control

Acuna, J. et al (2023), ACOG, Baltimore

Day Length Predicts Ovulatory Shifts in Women’s Reproductive Function

Pearson, JT. et al (2022), ESHRE, Milan

Association between menstrual cycle length and COVID-19 Vaccination: a Global Cohort

Edelman, A. et al. (2022) ESC, Ghent

From thermometer to finger ring, basal body temperature measurement in the new era of FDA cleared digital contraception

Pearson, JT. et al (2021) ESG, Venice

Advantages of determining the fertile window with the individualised Natural Cycles algorithm over calendar-based methods

Kleinschmidt, T. et al. (2020), ESC, Ireland

Analysis of Menstrual Cycle Data from a Fertility Awareness Based Mobile Application

Bull, J. et al. (2019), ESHRE, Austria

Effectiveness of a Digital Fertility Awareness-Based App for Contraception in the United States

Rowland, S. et al. (2019), ACOG, USA

Impact of Sleep Habit on the Contraceptive Effectiveness of a Fertility Awareness-Based App

Rowland, S. et al. (2019), ACOG, USA

Contraceptive effectiveness of an app in Germany, Australia, Sweden and Finland

Bull, J. et al. (2018), DGGG, Germany (in German)

Comparison of contraceptive effectiveness between country cohorts

Bull, J. et al. (2018), FIGO, Brazil (Page 951)

Effectiveness of the Natural Cycles app as a method of contraception

Bull, J. et al. (2018), ASRM, USA

The acceptability of a mobile application for contraception

Lundberg, O. et al. (2018), ESC, Hungary

Conception probability using the Natural Cycles app when planning a pregnancy

Lundberg, O. et al. (2018), ESHRE, Spain

Impact of Natural Cycles on unintended pregnancies in Sweden

Bull, J. et al. (2018), SFOG, Sweden

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