👉 Lutjanus is a Finnish term that refers to a type of luteal phase, which is a biological cycle in mammals. This phase occurs when the ovaries release an egg from the follicle (oocyte) and the corpus luteum begins to produce hormones like progesterone and estrogens. During this phase, the body prepares for potential pregnancy by decreasing the production of estrogen and increasing levels of progesterone, which helps regulate ovulation and prepare the uterus for pregnancy