Female Reproductive System

• a sign that a girl is capable of producing offspring

  menstruation
• a series of changes during which an egg matures, and the uterus is prepared for possible pregnancy

  menstruation
• It entails biological feedback system that regulates the activities of the structures involved in the processes

  menstruation
• The menstrual cycle is influenced by the endocrine system through the complex interaction of the hypothalamus, pituitary and gonads
• The length of the menstrual cycle varies from woman to woman but the average cycle is 28 days.
• The follicular phase starts on day 1 of menstruation and ends with ovulation (day 14).
• What hormone produces estrogen?

  Follicle Stimulating Hormone
• Stimulates follicular growth in ovaries?

  FSH
• Stimulates estrogen secretion from developing follicles

  FSH
• Surge causes ovulation

  LH
• Results in the formation of a corpus luteum (a structure formed as a mature egg pops out of a follicle)

  LH
• Triggers corpus luteum to secrete progesterone

  LH
• Thickens endometrium

  Estrogen
• Stimulates the pituitary gland to release LH causing ovulation

  Estrogen
• Stops FSH being produced so that only one egg matures in a cycle

  Estrogen
• Thickens endometrium?

  Progesterone
• Inhibits FSH and LH (luteal phase)

  Progesterone
• positive feedback intensifies a response while negative feedback reduces the effect of a stimulus.
• During the cycle, negative feedback mechanism keeps the levels of hormones relatively stable.
• Uterine lining starts to thicken with new layer of tissue. An egg is developing in the ovary?

  Follicular Phase
• The day when an egg may be released from any of the two ovaries is on day 14. This is called ovulation. It is half-way in the cycle.
• If the egg was not fertilized or implantation did not occur, hormonal changes signal the uterus to prepare to shed its lining. This is called the luteal phase.
• Mass of ovarian cells produces an ovum
• break down and discharge of the soft uterine tissues and the unfertilized egg?

  Menstruation
• A female experiences body changes even before the first menstruation which is also known as menarche
• Starts a series of hormonal changes that make a woman capable of pregnancy?

  Pituitary Gland
• •releasing of the mature eggth day of the cycle

  •egg is ready for fertilization within 24 hours from its release

  •occurs on the 14

  Ovulation