Fig. 3

Targeted steroid 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 = 18 per phase, except for the CLD1 phase (n = 17)) and pseudopregnant (PP, blue, n = 21 per phase, except for the anestrus and LAL phase (n = 20 and 18, respectively)) cycles. UA1 = unknown androgen 1, an analogue of 11β-hydroxyetiocholanolone. An anestrus, CLD corpus luteum dormancy phase, EAL early active luteal phase, LAL late active luteal phase.