AMH and hydrops fetalis: In the HF herd, AMH levels (mean ± SEM) were 447.2 ± 53.91 in August 2022, decreasing to 412.2 ± 53.82 in September and 380.22 ± 54.99 in November, and then increasing to 450.70 ± 48.44 in March 2023 and peaking at 529.85 ± 65.97 in August 2023 (p = 0.42).