Podcast
Questions and Answers
What is the primary hormone that rises during the luteal phase of the menstrual cycle?
What is the primary hormone that rises during the luteal phase of the menstrual cycle?
During which phase does the dominant follicle develop and estradiol levels begin to rise?
During which phase does the dominant follicle develop and estradiol levels begin to rise?
What happens to hormone levels immediately after ovulation?
What happens to hormone levels immediately after ovulation?
What is the significance of Day 24 in the menstrual cycle?
What is the significance of Day 24 in the menstrual cycle?
Signup and view all the answers
Which of the following days marks the peak in estradiol levels?
Which of the following days marks the peak in estradiol levels?
Signup and view all the answers
What characterizes the follicular phase of the menstrual cycle between Days 5-13?
What characterizes the follicular phase of the menstrual cycle between Days 5-13?
Signup and view all the answers
What hormone begins to rise sharply just before ovulation on Day 14?
What hormone begins to rise sharply just before ovulation on Day 14?
Signup and view all the answers
Which statement is true regarding hormonal changes during the luteal phase (Days 15-24)?
Which statement is true regarding hormonal changes during the luteal phase (Days 15-24)?
Signup and view all the answers
What occurs on Day 24 of the menstrual cycle if fertilization does not take place?
What occurs on Day 24 of the menstrual cycle if fertilization does not take place?
Signup and view all the answers
How is the menstrual cycle length classified as normal, although variable?
How is the menstrual cycle length classified as normal, although variable?
Signup and view all the answers
Study Notes
Menstrual Cycle Overview
- The menstrual cycle is a complex process regulated by hormones, typically lasting 28 days.
- Variations in cycle length are common, ranging from 21 to 35 days.
- "Normal" refers to what is typical or average for an individual.
- Apps can assist in tracking the menstrual cycle.
Day 1: The Beginning of the Cycle
- This marks the first day of the period (LMP).
- Blood and tissue from the uterus are expelled through the cervix.
- Hormone levels (LH, FSH, progesterone, estradiol) are low.
- The ovary begins to form follicles, transitioning into the follicular phase, which lasts until ovulation.
Days 5-8: Follicle Development
- A dominant follicle emerges.
- Estradiol levels rise, with a significant increase by day 8, stimulating follicle growth.
- The period ends and the uterine lining starts to rebuild.
- Days 9-13 continue the follicular phase, with escalating estradiol levels and continued uterine lining development.
- LH levels increase sharply before ovulation.
Day 14: Ovulation
- Estradiol levels peak.
- There's a sudden surge in LH and FSH.
- An egg is released from the ovary.
- Estradiol levels drop significantly.
- Ovulation increases the chance of pregnancy.
Days 15-24: The Luteal Phase
- Estradiol, FSH, and LH levels decrease.
- The luteal phase begins with the formation of the corpus luteum.
- Progesterone levels start to rise, becoming the primary hormone during this phase.
- Estradiol levels gradually increase.
Days 24-28: Premenstrual Week
- The oocyte degenerates if not fertilized.
- Estrogen and progesterone levels decline by day 24.
- This period is considered the premenstrual week.
- By day 1, the uterine lining and any remaining oocyte are shed from the body, marking the start of a new cycle.
Menstrual Cycle
- The menstrual cycle is typically 28 days, but can range from 21-35 days
- Day 1 of the menstrual cycle is considered the first day of the period (LMP)
- The menstrual cycle is regulated by hormones: LH, FSH, progesterone, estradiol
- The menstrual cycle has two primary phases: follicular and luteal
Follicular Phase
- Days 1-14 of the cycle
- Starts with low hormone levels
- The ovary begins to form follicles
- A dominant follicle forms during days 5-8
- Estradiol levels increase from day 8 onwards
- The period stops as the uterine lining begins to rebuild
- The uterine lining continues to build from days 9-13
- Estradiol rises throughout the follicular phase
- LH levels sharply rise just before ovulation
Ovulation
- Occurs on day 14
- Estradiol levels peak
- Sharp rise in LH and FSH levels
- The egg is released from the ovary
- Estradiol levels sharply drop
- Increased risk of pregnancy
Luteal Phase
- Days 15-24 of the cycle
- Estradiol, FSH, and LH levels decrease
- The corpus luteum forms
- Progesterone levels rise
- Progesterone is the primary hormone during the luteal phase
- Estradiol levels slowly rise
Premenstrual Week
- Days 24-28 of the cycle
- The oocyte breaks apart if not fertilized
- Estrogen and progesterone levels drop on day 24
- Considered premenstrual week
- Uterine lining and oocyte shed on day 1, starting a new cycle
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the intricacies of the menstrual cycle, which typically lasts 28 days and is regulated by various hormones. Understand the stages from Day 1, when menstruation begins, to the follicular phase where dominant follicles develop. Learn how apps can aid in tracking these changes.
