👉 Estriol, also known as human chorionic gonadotropin (hCG), is a hormone produced by the placenta during pregnancy and plays a crucial role in the development of the fetus. Estriol is essential for the growth and development of the fetus, including the development of the brain, eyes, and heart. Estriol is produced by the placental cells and can be detected through various methods such as blood tests or ultrasound imaging. It is primarily involved in the regulation