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Table 1 Inclusion and exclusion criteria according to time of inclusion

From: AURORA: bariatric surgery registration in women of reproductive age - a multicenter prospective cohort study

  Before surgery (T1) After surgery (T2-T5) Pregnancy (T6) Breast milk composition
Inclusion criteria *women aged 18–45
*approved for bariatric surgery (all types of surgery)
*internet connection and email
*women aged 18–45
*previous bariatric surgery (all types of surgery)
*internet connection and email
*women aged 18–45
*previous bariatric surgery (all types of surgery)
* < 15 weeks of gestation
*internet connection and email
*women aged 18–45
*lactating women with previous bariatric surgery
*pregnancy duration between 37 and 41 weeks
Exclusion criteria *infertility (e.g. menopause, hysterectomy) *infertility (e.g. menopause, hysterectomy) / *use of medication possibly affecting breast milk (discussed individually with neonatologist)
*problems or difficulties with breastfeeding
* > 10 % weight loss in newborn 4 days after delivery
*diabetes or GDM
  1. Abbreviations: GDM gestational diabetes mellitus, T time = measuring moment