Fig. 2

Untargeted polar metabolic feature abundances in pregnant and pseudopregnant giant pandas across the reproductive phases. Feature abundances are based on peak areas of the different samples per reproductive phase in pregnant (P, orange, n = 15 per phase) and pseudopregnant (PP, blue, n = 21 per phase) cycles. O-methoxyhippuric acid and n-aminodecanoic acid are putatively identified (Tier 3). An anestrus, CLD corpus luteum dormancy phase, EAL early active luteal phase, LAL late active luteal phase.