Estetrol (E4) is an estrogenic steroid molecule synthesized exclusively by the fetal liver during human pregnancy and reaching the maternal circulation through the placenta. Estetrol (E4) is a natural fetal estrogen. The safety of increasing doses of E4 and its preliminary effects on the vagina, endometrium and menopausal vasomotor symptoms were investigated.
No special preparation is needed for E4. Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing E4. Your doctor depending on your condition will give specific instructions.
|5 - 7
|< 140 - 210 pg/ml indicates fetal distress