Menstrual Cycle Flashcards
The uterus sheds its inner lining
Menstrual Phase
What are the phases of the menstrual cycle? by order
- Menstrual Phase
- Follicular Phase
- Ovulation Phase
- Luteal Phase
Menstrual Blood is shed from the uterus through the cervix through the vaginal opening
Menstrual Phase
Some eggs begin to mature in the ovaries
Menstrual Phase
Why do females experience cramping during the menstrual phase?
Due to contraction of uterine and abdominal muscle that help in expelling menstrual fluid.
Pituitary Gland releases follicle-stimulating hormone
Follicular Phase
One follicle will rise from the ovary and one egg will be released
Follicular Phase
Estrogen level increases in this phase
Follicular Phase
The endometrium gets thicker in this phase
Follicular Phase
This is the release of an ovum from the surface of the ovary
Ovulation
From which day is the ovulatory phase?
14th day
For how many days does the ovulatory phase last?
3-4 days
In this phase, the uterine lining gets thicker and thicker
Ovulatory Phase
This causes the eggs to be released from the follicle
Luteinizing Hormone
Egg is released from the ovary going to the fallopian tube
Ovulatory Phase
Follicle Stimulating Hormone (FSH) & Luteinizing Hormone (LH) decreases
Luteal Phase
Follicle becomes sealed & becomes the corpus luteum
Luteal Phase
It is a yellow structure in the ovary that produces estrogen and large amount of progesterone.
Corpus Luteum
Hormone that signals the ureter to thicken
Progesterone
If the egg is fertilized, the corpus luteum will produce more estrogen which makes the endometrium thick with blood.
Luteal Phase
For how many days does the luteal phase last?
15-28 (14 days)
if the egg is not fertilized, the corpus luteum will disintegrate, progesterone will drop, estrogen level rises, and endometrium will shed through menses
Luteal Phase
What happens if the egg is fertilized?
The corpus luteum will produce more estrogen
What if the egg is not fertilized?
The corpus luteum will disintegrate, progesterone will drop, estrogen level rises, and endometrium sheds through menstruation.
When a sperm cell unites with ovum.
Fertilization
Fertilized egg
Zygote
How are identical twins formed?
One ovum splits and develops into two babies
How are fraternal twins formed?
Two eggs are fertilized by two sperm.
This is the opening of the vagina, a thin fleshy tissue.
Hymen
How does the hymen stretch open?
Extreme activity such as riding a bike or extreme sports
Skin that covers the head of the penis
Foreskin
