LRAT and hydrops fetalis: QPCR analysis showed that in WT female mice, expression of Lrat (p < 0.001), Cyp26b1 (p = 0.003), Rbp6 (p = 0.001), and Rdh10 (p < 0.001) fluctuated across the HF cycle (Fig. 4a, Supplementary Table 2 and Supplementary Fig. 4).