During the menstrual cycle, the lining of the uterus undergoes several changes:
1. Menstrual Phase: At the start of the cycle, if no fertilization occurs, hormone levels drop, triggering the shedding of the uterine lining (menstruation) which lasts for about 3-7 days.
2.Proliferative Phase: Following menstruation, rising estrogen levels prompt the uterus lining to thicken and regenerate. This phase prepares the uterus for potential implantation. Blood vessels and glands develop, creating a supportive environment for a fertilized egg.
3.Ovulation: Around the middle of the cycle (usually day 14 in a 28-day cycle), a surge in luteinizing hormone triggers the release of an egg from the ovary.
4.Secretory Phase: After ovulation, the ruptured follicle transforms into the corpus luteum, producing progesterone. This hormone helps the uterine lining become more glandular and vascular, preparing for a potential embryo's implantation.
5.Implantation or Menstruation: If fertilization occurs, the fertilized egg implants in the thickened uterine lining. If not, the drop in hormone levels initiates menstruation, and the cycle begins again.
These cyclic changes in the uterus lining are regulated by hormones, primarily estrogen and progesterone, orchestrating a dynamic environment suitable for conception and pregnancy.
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Here's the answer:
Day one of your cycle is the first day of your period. This is when your uterus starts shedding the lining it has built up over the last 28 days.
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Answer:
During the menstrual cycle, the lining of the uterus undergoes several changes:
1. Menstrual Phase: At the start of the cycle, if no fertilization occurs, hormone levels drop, triggering the shedding of the uterine lining (menstruation) which lasts for about 3-7 days.
2.Proliferative Phase: Following menstruation, rising estrogen levels prompt the uterus lining to thicken and regenerate. This phase prepares the uterus for potential implantation. Blood vessels and glands develop, creating a supportive environment for a fertilized egg.
3.Ovulation: Around the middle of the cycle (usually day 14 in a 28-day cycle), a surge in luteinizing hormone triggers the release of an egg from the ovary.
4.Secretory Phase: After ovulation, the ruptured follicle transforms into the corpus luteum, producing progesterone. This hormone helps the uterine lining become more glandular and vascular, preparing for a potential embryo's implantation.
5.Implantation or Menstruation: If fertilization occurs, the fertilized egg implants in the thickened uterine lining. If not, the drop in hormone levels initiates menstruation, and the cycle begins again.
These cyclic changes in the uterus lining are regulated by hormones, primarily estrogen and progesterone, orchestrating a dynamic environment suitable for conception and pregnancy.