text: To monitor state-dependent mood and lifestyle measures, the 
  following scales were administered on each experiment day: Perceived 
  Stress Scale50, Pittsburgh Sleep Quality Index51, State-Trait Anxiety 
  Inventory for Adults52 and Profile of Mood States53. Correlation analy- 
  ses between state-dependent measures, summary brain metrics and 
  gestation week revealed little to no relationships. The only exception 
  to this was a moderate negative association between global QA and 
  state anxiety (Spearman’s correlation (*ρ*) = −0.65,*q*= 0.04; baseline—36 
  weeks,*n*= 16). By making this data openly accessible, we encourage a 
  more nuanced approach toward exploring mood and lifestyle measures 
  in relation to brain changes over pregnancy. 
  
  **Endocrine procedures**
  The participant underwent a blood draw (*n*= 19; Fig. 1c) before 
  MRI scanning. Sex steroid concentrations were determined via 
  ultra-sensitive liquid chromatography–mass spectrometry at the 
  Brigham and Women’s Hospital Research Assay Core (BRAC). Assay 
  sensitivities, dynamic range and intra-assay coefficients of variation 
  
  Nature Neuroscience 