👉 Peri- and perinatal hormones play crucial roles in pregnancy, specifically during the first trimester when they are released by the placenta to regulate fetal development and growth. These hormones include progesterone (prog), which helps maintain pregnancy; luteinizing hormone (LH), which stimulates ovulation; follicle-stimulating hormone (FSH), which promotes egg maturation; and human chorionic gonadotropin (hCG), which is released during pregnancy to
