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![biology_most_general_questions_ #biology #science - MENSTRUAL CYCLE IN HUMANS In females; the menstrual cycle is ೩ 28-day cycle (on average) that prepares the body for pregnancy Phases of the Cycle: Menstrual Phase (Day 1-5) Shedding of the uterine lining (endometrium). Blood and tissue flow out Menstruation 7 Follicular Phase (Day 6-13) FSH (Follicle Stimulating Hormone ) stimulates ovarian follicle growth uterine lining thickens Estrogen level rises > Ovulation Phase (Day 14) LH (Luteinizing Hormone) surge release of mature ) egg from ovary Most fertile period Luteal Phase (Day 15-28) Corpus luteum forms secretes progesterone > Prepares uterus for implantation] progesterone drops If no fertilization > cyle restarts Key Point: 28 days, but can vary (21-35 days). Average] cycle' == Hormones (FSH, LH, Estrogen Progesterone) regulate the cycle MENSTRUAL CYCLE IN HUMANS In females; the menstrual cycle is ೩ 28-day cycle (on average) that prepares the body for pregnancy Phases of the Cycle: Menstrual Phase (Day 1-5) Shedding of the uterine lining (endometrium). Blood and tissue flow out Menstruation 7 Follicular Phase (Day 6-13) FSH (Follicle Stimulating Hormone ) stimulates ovarian follicle growth uterine lining thickens Estrogen level rises > Ovulation Phase (Day 14) LH (Luteinizing Hormone) surge release of mature ) egg from ovary Most fertile period Luteal Phase (Day 15-28) Corpus luteum forms secretes progesterone > Prepares uterus for implantation] progesterone drops If no fertilization > cyle restarts Key Point: 28 days, but can vary (21-35 days). Average] cycle' == Hormones (FSH, LH, Estrogen Progesterone) regulate the cycle - ShareChat](https://cdn4.sharechat.com/bd5223f_s1w/compressed_gm_40_img_653878_1e4fb6a3_1759235652076_sc.jpg?tenant=sc&referrer=pwa-sharechat-service&f=076_sc.jpg "biology_most_general_questions_ #biology #science - MENSTRUAL CYCLE IN HUMANS In females; the menstrual cycle is ೩ 28-day cycle (on average) that prepares the body for pregnancy Phases of the Cycle: Menstrual Phase (Day 1-5) Shedding of the uterine lining (endometrium). Blood and tissue flow out Menstruation 7 Follicular Phase (Day 6-13) FSH (Follicle Stimulating Hormone ) stimulates ovarian follicle growth uterine lining thickens Estrogen level rises > Ovulation Phase (Day 14) LH (Luteinizing Hormone) surge release of mature ) egg from ovary Most fertile period Luteal Phase (Day 15-28) Corpus luteum forms secretes progesterone > Prepares uterus for implantation] progesterone drops If no fertilization > cyle restarts Key Point: 28 days, but can vary (21-35 days). Average] cycle' == Hormones (FSH, LH, Estrogen Progesterone) regulate the cycle MENSTRUAL CYCLE IN HUMANS In females; the menstrual cycle is ೩ 28-day cycle (on average) that prepares the body for pregnancy Phases of the Cycle: Menstrual Phase (Day 1-5) Shedding of the uterine lining (endometrium). Blood and tissue flow out Menstruation 7 Follicular Phase (Day 6-13) FSH (Follicle Stimulating Hormone ) stimulates ovarian follicle growth uterine lining thickens Estrogen level rises > Ovulation Phase (Day 14) LH (Luteinizing Hormone) surge release of mature ) egg from ovary Most fertile period Luteal Phase (Day 15-28) Corpus luteum forms secretes progesterone > Prepares uterus for implantation] progesterone drops If no fertilization > cyle restarts Key Point: 28 days, but can vary (21-35 days). Average] cycle' == Hormones (FSH, LH, Estrogen Progesterone) regulate the cycle - ShareChat")