Based on limited published evidence, CYP3A7-CYP3A51P encodes a cytochrome P450 monooxygenase involved in steroid hormone and vitamin metabolism during embryogenesis 12345. The enzyme catalyzes hydroxylation of carbon-hydrogen bonds using NADPH via cytochrome P450 reductase. It metabolizes DHEA and exhibits high catalytic activity for estrone hydroxylation, particularly at the C16-alpha position 23. CYP3A7-CYP3A51P hydroxylates all-trans-retinoic acid for potential clearance during fetal development 1 and metabolizes xenobiotics including anticonvulsants 5. Genetic variants influence sulfated sex hormone levels 6.