Menstrual cycle

• What is the caved end of the humerus called?

  It is called the sining of the humerus
• Which hormones control the menstrual cycle?

  LH, FSH, oestrogen, progesterone
• What is the role of the corpus luteum?

  It produces progesterone
• What does progesterone do?

  It maintains the lining of the uterus
• What are egg follicles?

  Fluid-filled sacs in the ovaries
• How many egg follicles is a woman born with?

  Millions of egg follicles
• What regulates the development of egg follicles?

  Hormones
• What does LH stand for?

  Luteinizing hormone
• What triggers ovulation?

  Luteinizing hormone (LH)
• Where is LH produced?

  In the pituitary gland
• What happens to the ruptured follicle after ovulation?

  It becomes the corpus luteum
• What is the role of progesterone after ovulation?

  It maintains the uterus lining for implantation
• What happens if there is no fertilization?

  The corpus luteum shrinks and progesterone drops
• What does the drop in progesterone cause?

  The endometrium lining to break down
• What happens to FSH levels after the endometrium breaks down?

  FSH levels increase
• What does FSH do in the menstrual cycle?

  It causes an egg to mature in the ovary
• What does oestrogen do in the menstrual cycle?

  It stops FSH production and stimulates LH
• What happens to the ruptured follicle?

  It changes into the corpus luteum
• What does the corpus luteum release?

  Progesterone
• What are the main hormones involved in the menstrual cycle and their roles?

  • FSH: Stimulates egg maturation
  • LH: Triggers ovulation
  • Oestrogen: Stops FSH production, stimulates LH
  • Progesterone: Maintains uterine lining for implantation
• Describe the menstrual cycle process.

  1. FSH stimulates egg maturation.
  2. Oestrogen is produced, stopping FSH.
  3. LH triggers ovulation.
  4. Corpus luteum forms, producing progesterone.
  5. If no fertilization, corpus luteum shrinks, progesterone drops.
  6. Endometrium breaks down, FSH levels increase.