Female Reproductive System and Fertility • Lesson • Lenny.com
Female Reproductive System and Fertility
A comprehensive lesson on the female reproductive system, covering anatomy, the menstrual cycle, and the process of fertilization for grades 9-12. Students will identify structures, explain hormonal changes, and analyze the conditions necessary for conception.
Typically around Day 14, triggered by an LH surge. Cycles vary, so timing is never 100% fixed!
Physical Signs
• Clear, slippery, stretchy mucus
• Basal body temperature rise (0.2–0.5°C)
• Mild lower abdominal pain (Mittelschmerz)
Fertile Window
Spans 5 days before ovulation through 1 day after. Helpful for planning, but NOT reliable birth control.
The Fertilization Process
1
Ovulation
Egg released and swept into Fallopian tube.
2
Sperm Journey
Sperm travel through cervix and uterus to tube.
3
Fertilization
Genetic material combines; zygote forms.
4
Cell Division
Zygote becomes blastocyst as it travels.
5
Implantation
Blastocyst implants in uterine lining; pregnancy begins.
Fertilization happens in the Fallopian Tube, NOT the uterus!
Let's Apply What We Know!
01
Complete your assigned Tier 1, 2, or 3 Worksheet
02
Use Inner Body for anatomy labeling details
03
Choose between App Investigation or Product Research
Submit ALL work in Google Classroom for credit!
Exit Ticket
Summarizer
1
Name ONE internal and ONE external structure and explain their functions.
2
Which menstrual phase is most fertile? Explain the hormonal trigger.
3
Describe what happens during fertilization. Where does it occur?
Bonus
Why is cycle length variable, and what factors can affect it?
The hormone that triggers ovulation is called ________________________ .
After the egg is released, it is only viable for about ________________________ .
Sperm can survive in the body for ________________________ , which extends the fertile period.
The best time to conceive is called the ________________________ .
Fertilization happens in the ________________________ , not the uterus.
SECTION 3: Fertilization (20 pts)
7. Number these fertilization steps 1–5 in the correct order. (10 pts)
The blastocyst implants in the uterine lining — pregnancy begins.
Sperm travel through the vagina and cervix toward the fallopian tube.
One sperm penetrates the egg; a zygote is formed.
The egg is released from the ovary and swept into the fallopian tube.
The zygote divides into many cells and becomes a blastocyst.
8. Complete the paragraph using the Word Bank. (10 pts)
fallopian tube sperm uterus zygote 24 hours
Fertilization takes place in the ______________________. For this to happen, ______________________ must reach the egg within ______________________ of ovulation. When one sperm successfully enters the egg, a ______________________ is formed. It then travels to the ______________________ for implantation.
SECTION 4: Quick Reflection (10 pts)
9. Complete TWO of the four sentence starters below. (10 pts)
A. Something new I learned today is...
B. The part of the female reproductive system I found most interesting is... because...
Goal: Explain the four phases of the menstrual cycle and what happens in the body during each one.
5. Use the Word Bank to match each phase with its description. (8 pts)
A mature egg is released from the ovary due to an LH surge. (~Day 14)
Progesterone prepares the uterine lining for possible pregnancy. (Days 15–28)
6. Complete the sentences about ovulation. (6 pts)
LH 24 hours fallopian tube fertile window 3–5 days Day 14
Ovulation usually occurs around ________________________ of a 28-day cycle.
The egg is only viable (alive) for about ________________________ after it is released.
Sperm can survive inside the body for ________________________ , which is why the fertile window is longer than 24 hours.
The hormone that triggers ovulation is called ________________________ .
The most fertile time in the cycle is called the ________________________ .
After the egg is released, it travels into the ________________________ .
7. STUDENT CHOICE — Circle which investigation you completed: (6 pts)
A) Tracking App Investigation OR B) Menstrual Product Research & Allyship
Sentence starter: The most surprising thing I learned was...
One question I still have is:
8. Why is counting cycle days NOT a reliable form of birth control? (5 pts)
Sentence starter: Counting cycle days is not reliable because cycles can change when...
SECTION 3: Fertilization & Conception (15 pts)
Goal: Describe how fertilization happens — step by step — and what conditions are needed.
9. Number the steps of fertilization from 1 to 5 (1 = first to happen). (5 pts)
Order #
Step — What Happens
The blastocyst implants in the uterine lining and pregnancy begins.
The egg is released from the ovary and swept into the fallopian tube.
One sperm penetrates the egg and a zygote is formed.
Sperm travel through the vagina, cervix, and uterus toward the egg.
The zygote divides into many cells and becomes a blastocyst.
10. Fill in the blanks to complete the paragraph about fertilization. (5 pts)
fallopian tube sperm uterus zygote 24 hours
Fertilization happens in the ______________________. For fertilization to occur, ______________________ must reach the egg within ______________________ of ovulation. When one sperm successfully enters the egg, the two sets of genetic material combine to form a ______________________. This then travels to the ______________________ for implantation.
11. In your own words, what conditions are needed for fertilization to be possible? List TWO. (5 pts)
Sentence starter: Two conditions that need to be present are...
SECTION 4: My Learning Reflection (10 pts)
12. Complete the reflection using the sentence starters below. (10 pts)
Something new I learned in this lesson is...
The part I found most interesting was... because...
Understanding this topic matters in real life because...
TOTAL: / 85 pts
6. STUDENT CHOICE — Circle which investigation you completed: (8 pts)
A) Tracking App Investigation OR B) Menstrual Product Research & Allyship
Summarize your most significant finding in 3–4 sentences. Include at least ONE piece of data or evidence.
CRITICAL THINKING:
Why is the 'rhythm method' (tracking cycles for birth control) considered unreliable? Incorporate your knowledge of hormonal variability and the fertile window into your response. (10 pts)
SECTION 3: Fertilization & Conception (25 pts)
Objective: Evaluate and describe the biological process of fertilization, including the specific conditions required for successful conception. (GD.11-12.3)
8. Place the following fertilization steps in the correct order (1–5) and briefly explain what happens at each step in your own words. (10 pts)
9. What specific conditions must be present for fertilization to be possible? List and explain THREE. (9 pts)
APPLICATION:
A couple is trying to conceive. Using your knowledge of ovulation, sperm viability, and the fertile window, advise them on the optimal timing. Be specific and scientifically accurate. (6 pts)
SECTION 4: Visual Synthesis Project (15 pts)
11. Create an infographic, TikTok-style storyboard, or Instagram carousel.
Topic: 'Why tracking ovulation is NOT reliable birth control'
Your visual must include: (check each off when done)
The fertility window explained (cycle, survival time)
Actual statistics on 'rhythm method' failure rates
Why cycles vary (stress, illness, hormones, etc.)
2–3 reliable birth control alternatives with rates
Attach your completed visual or paste a screenshot/link here:
Briefly describe your format choice and one key health literacy takeaway from your visual. (3 pts)
