AMH and spontaneous abortion: Apart from this, there were significant differences in maternal age at oocyte retrieval (P=0.017), paternal age (P=0.024), duration of infertility (P=0.002), body mass index (BMI) (P=0.011), gravidity (P=0.023), parity (P=0.019), number of previous miscarriages (P=0.008), infertility diagnosis (P=0.014) and AMH (P<0.001).