| Study | Reason for exclusion |
|---|---|
| ACTRN12610000631000 2010 | Wrong intervention: acupuncture; no minimal comparison group (lifestyle advice in both groups) |
| Aflatoonian 2014 | Wrong intervention: no preconception lifestyle advice (vitamin D) |
| Agricola 2014 | Wrong study design: no RCT |
| Asemi 2014 | Wrong patient population: not infertile (gestational diabetes) |
| Ashcroft 1997 | Wrong intervention: no preconception lifestyle advice (patient education) |
| Bai 2019 | Wrong intervention: intervention on psychological distress |
| Bailey 2015 | Wrong patient population: recurrent miscarriages |
| Barbour 2020 | Wrong intervention: no preconception lifestyle advice (counselling on infertility treatment) |
| Becker 2015 | Wrong intervention: main component LGI ‐ diet (no advice) |
| Beerendonk 1996a | Wrong intervention: no preconception lifestyle advice; sodium restriction to reduce bloating |
| Beerendonk 1996b | Wrong intervention: no preconception lifestyle advice; sodium restriction to reduce bloating |
| Beerendonk 1999 | Wrong intervention: no preconception lifestyle advice; sodium restriction to reduce bloating |
| Bell 2000 | Wrong patient population: not infertile (antenatal population) |
| Bernard 2020 | Wrong intervention: no preconception lifestyle advice (counselling on infertility treatment) |
| Bisht 2018 | Wrong intervention: no RCT |
| Bodin 2017 | Wrong patient population: not infertile |
| Bodin 2018 | Wrong patient population: not infertile |
| Carpenter 2016 | Wrong intervention: strict diet intervention; walnut supplementation |
| Chan 2012 | Wrong intervention: preconception lifestyle advice not main component (integrative body/mind/body intervention) |
| Chan 2015 | Wrong study design: no RCT |
| Chavarro 2016 | Wrong study design: no RCT |
| Christensen 2017 | Wrong study design: no RCT |
| Clark 2000 | Wrong intervention: no minimal control (standard weight loss advice vs attendance at a group session) |
| Clifton 2017 | Wrong intervention: preconception lifestyle advice not main component (mind/body intervention) |
| Clifton 2018 | Wrong intervention: preconception lifestyle advice not main component (mind/body intervention) |
| Connolly 1993 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| CTRI201711010514 2017 | Wrong intervention: strict exercise intervention (supervised yoga visits) |
| Dancet 2019 | Wrong intervention: preconception lifestyle advice not main component (sexual education intervention) |
| Domar 2009 | Wrong intervention: preconception lifestyle advice not main component (mind/body intervention) |
| Domar 2011 | Wrong intervention: preconception lifestyle advice not main component (mind/body intervention) |
| Domar 2019 | Wrong intervention: preconception lifestyle advice not main component (mind/body intervention) |
| Dortaj 2016 | Wrong intervention: preconception lifestyle advice not main component (mindfulness) |
| DRKS00017554 2019 | Wrong patient population: not infertile |
| Einarsson 2017a | Wrong intervention: strict weight loss intervention with liquid formula diet |
| Einarsson 2017b | Wrong intervention: strict weight loss intervention with liquid formula diet |
| Einarsson 2018 | Wrong intervention: strict weight loss intervention with liquid formula diet |
| Einarsson 2019 | Wrong intervention: strict weight loss intervention with liquid formula diet |
| Elsinga 2008 | Wrong study design: no RCT |
| Emery 2001 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| Emery 2002 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| Emery 2003 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| Emery 2004 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| Emery 2006 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| Espinos 2017 | Wrong intervention: main component LGI ‐ diet (no advice) |
| Fauque 2007 | Wrong study design: no RCT |
| Galhardo 2013 | Wrong study design: no RCT |
| Garruti 2017 | Wrong study design: no RCT |
| Gaskins 2018 | Wrong study design: no RCT |
| Gaskins 2019 | Wrong study design: no RCT |
| Gautam 2019a | Wrong intervention: strict exercise intervention (supervised yoga visits) |
| Gautam 2019b | Wrong intervention: strict exercise intervention (supervised yoga visits) |
| Goswami 2015 | Wrong study design: no RCT |
| Guzick 1994 | Wrong patient population: not infertile |
| Hamzehgardeshi 2019 | Wrong intervention: preconception lifestyle advice not main component (fertility education and group counselling) |
| Hoirisch Clapauch 2017 | Wrong patient population: recurrent miscarriages |
| HuMl 2016 | Wrong study design: no RCT |
| IRCT201110267915N1 2014 | Wrong intervention: no preconception lifestyle advice (psychological counselling) |
| IRCT201301189463N 2017 | Wrong study design: no RCT |
| IRCT20150119020719N6 2018 | Wrong intervention: preconception lifestyle advice not main component (fertility education and group counselling) |
| IRCT2016012610324N 2016 | Wrong patient population: not infertile (preconception) |
| IRCT20160605028270N2 2020 | Wrong intervention: strict exercise intervention (no exercise allowed outside intervention) |
| ISRCTN03259732 2014 | Wrong patient population: not infertile (women planning pregnancy) |
| ISRCTN11081163 2016 | Wrong patient population: not infertile (preconception) |
| ISRCTN17222161 2017 | Other reason, trial superseded by another trial |
| Jaffar 2018 | Wrong study design: no RCT |
| Jamali 2016 | Wrong intervention: no preconception lifestyle advice; psychological and sexual counselling |
| Jiménez Tuñón 2017 | Wrong intervention: no preconception lifestyle advice; supplements: melatonin, myo‐inositol, folic acid, selenium |
| Kaya 2016 | Wrong study design: no RCT (interventional) |
| Kermack 2014 | Wrong intervention: no preconception lifestyle advice; strict diet intervention |
| Kermack 2017 | Wrong intervention: no preconception lifestyle advice; strict diet intervention |
| Kersten 2015 | Wrong intervention: preconception lifestyle advice not main component; tailored expected management and implementation |
| Kiel 2018 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised HITT) |
| Kirca 2019 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| Li 2016 | Wrong study design: no RCT |
| Li 2017 | Wrong intervention: preconception lifestyle advice not main component (fertility education and counselling) |
| Lundgren 2016 | Wrong intervention: strict exercise intervention (supervised) |
| Maleki 2017a | Wrong intervention: strict exercise intervention (no exercise allowed outside intervention) |
| Maleki 2017b | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (no exercise allowed outside intervention) |
| Maleki 2017c | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (no exercise allowed outside intervention) |
| Maleki 2018 | Wrong intervention: strict exercise intervention (no exercise allowed outside intervention) |
| Maleki 2020 | Wrong intervention: strict exercise intervention (no exercise allowed outside intervention) |
| Mirghafourvand 2020 | Wrong patient population: not infertile |
| Moran 2011 | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention and no minimal comparison group |
| Moran 2016b | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention and no minimal comparison group |
| Mori 2009 | Wrong intervention: preconception lifestyle advice not main component (stress management) |
| Mumford 2020 | Wrong study design: no RCT |
| Naab 2019 | Wrong intervention: no preconception lifestyle advice (depression intervention) |
| Nayar 2017 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| Nayar 2018 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| NCT01509066 2012 | Wrong patient population: not infertile |
| NCT01566929 2012 | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention with liquid formula diet |
| NCT01716429 2012 | Wrong patient population: solely PCOS |
| NCT01892111 2013 | Wrong patient population: solely PCOS |
| NCT01933633 2013 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised) |
| NCT01952795 2013 | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention |
| NCT01954498 2013 | Wrong intervention: no preconception lifestyle advice; strict diet intervention (walnut trial) |
| NCT02063256 2014 | Wrong study design: no RCT |
| NCT02432209 2015 | Wrong intervention: no minimal comparison group (lifestyle advice in both groups) |
| NCT02541487 2015 | Wrong study design: no RCT |
| NCT02648555 2016 | Wrong patient population: recurrent miscarriages |
| NCT02746601 2016 | Wrong study design: no RCT |
| NCT02752555 2016 | Wrong intervention: only lifestyle advice in control group (Intervention = Oral Carnitine) |
| NCT03050944 2017 | Wrong study design: no RCT (association) |
| NCT03343405 2017 | Wrong intervention: preconception lifestyle advice not main component (mind/body intervention) |
| NCT03348865 2017 | Wrong intervention: psychological counselling |
| NCT03475199 2018 | Wrong intervention: no preconception lifestyle advice; strict lifestyle intervention |
| NCT03553927 2018 | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention |
| NCT03898037 2019 | Wrong intervention: no minimal comparison group (lifestyle advice in both groups compared to metformin) |
| NCT04002414 2019 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention depending on activity level |
| NCT04273048 2020 | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention |
| NCT04585581 2020 | Wrong patient population: not infertile (< 6 months) |
| Nieschlag 1998 | Wrong intervention: psychological counselling |
| Overdijkink 2018 | Wrong study design: no RCT |
| PACTR201611001683280 2016 | Wrong study design: no RCT |
| Pedro 2019 | Wrong patient population: people desiring to become pregnant |
| Poehl 1999 | Wrong study design: no RCT (and psychological counselling) |
| Psaros 2015 | Wrong study design: no RCT (and mind/body intervention) |
| Rasoulzadeh 2013 | Wrong intervention: preconception lifestyle advice not main component (psychological counselling) |
| Rasoulzadeh 2018 | Wrong intervention: preconception lifestyle advice not main component (psychological counselling) |
| RBR‐7by76r 2016 | Wrong intervention: no minimal comparison group (lifestyle advice in both groups) |
| Rothberg 2016 | Wrong intervention: no preconception lifestyle advice; strict weight loss intervention (Optifast) |
| Sant'Anna 2017 | Wrong intervention: no minimal comparison group |
| Schick 2019 | Wrong intervention: positive adjustment coping intervention |
| Shahrestani 2012 | Wrong intervention: mindfulness‐based cognitive group therapy (MBCT) |
| Sim 2012 | Wrong intervention: strict weight loss intervention (VLED) |
| Sim 2014 | Wrong intervention: strict weight loss intervention (VLED) |
| Skogsdal 2019 | Wrong patient population: preconception lifestyle advice |
| Tolahunase 2017 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| Tolahunase 2018 | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| Tolahunase 2018a | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| Tolahunase 2018b | Wrong intervention: no preconception lifestyle advice; strict exercise intervention (supervised yoga visits) |
| Tsagareli 2006 | Wrong study design: no RCT and strict weight loss intervention (Optifast) |
| Twigt 2012 | Wrong study design: no RCT (association) |
| UMIN000009034 2012 | Wrong study design: no RCT |
| UMIN000016168 2015 | Wrong intervention (and study population): preconception lifestyle advice not main component (fertility education) |
| UMIN000027424 2017 | Wrong study design: no RCT |
| Vause 2018 | Wrong intervention: preconception lifestyle advice not main component (fertility education intervention) |
HITT: XXX.
LGI: XXX.
MBCT: mindfulness‐based cognitive therapy.
PCOS: polycystic ovarian syndrome.
RCT: randomised controlled trial.
VLED: very low energy diet.