NU664D
NU664D Exam 2 Questions with Detailed
Answers Graded A+ 2025-2026
when does menarche typically begin? -Correct Answer ✔2-3 years after thelarche
(breast buds)
thelarche -Correct Answer ✔breast buds
average age of menarche in the US -Correct Answer ✔12-13
what can lead to earlier menarche? -Correct Answer ✔high BMI
what regulates the menstrual cycle? -Correct Answer ✔HPO axis
three characteristics of menstrual bleeding -Correct Answer ✔frequency, volume,
length
normal menstrual bleeding frequency -Correct Answer ✔24-38 days with each new
cycle within 7-9 days of the last
normal menstrual volume -Correct Answer ✔5-80 ml
normal length of menstruation -Correct Answer ✔4.5-8 days
what happens during follicular phase -Correct Answer ✔hypothalamus releases
gonadotropin releasing hormone
anterior pituitary releases FSH and LH
follicles start developing
estrogen increases
one follicle dominates and produces more estrogen
other follicles go through atresia
estrogen and LH levels peak 24 hrs before ovulation
NU664D
, NU664D
ovulation occurs
when does the luteal phase begin -Correct Answer ✔with ovulation
what happens in the luteal phase -Correct Answer ✔shift from estrogen to
progesterone dominance
follicle ruptures
corpus luteum forms
progesterone is produced
the follicle ceases growth and endometrium secretes
how long is luteal phase -Correct Answer ✔14 days (14-28)
how long/when is follicular phase -Correct Answer ✔days 1-14
what triggers end of luteal phase and beginning of menses? -Correct Answer
✔drop in progesterone (and estrogen too but less important)
what do estrogen levels do throughout follicular and luteal phases? -Correct
Answer ✔surges with ovulation (end of follicular phase and beginning of luteal
phase)
what happens to the egg at the end of luteal phase and how long after ovulation
does this change take place? -Correct Answer ✔corpus luteum turns into corpus
albicans approx 9-11 days after ovulation
what phase of the uterine cycle corresponds with the follicular phase of the ovarian
cycle? -Correct Answer ✔proliferative phase same time as follicular phase
what is happening to endometrium during proliferative phase and why? -Correct
Answer ✔surge in estrogen thickens endometrial lining to prepare for pregnancy
also forms progesterone receptors to increase endometrial blood flow
NU664D
NU664D Exam 2 Questions with Detailed
Answers Graded A+ 2025-2026
when does menarche typically begin? -Correct Answer ✔2-3 years after thelarche
(breast buds)
thelarche -Correct Answer ✔breast buds
average age of menarche in the US -Correct Answer ✔12-13
what can lead to earlier menarche? -Correct Answer ✔high BMI
what regulates the menstrual cycle? -Correct Answer ✔HPO axis
three characteristics of menstrual bleeding -Correct Answer ✔frequency, volume,
length
normal menstrual bleeding frequency -Correct Answer ✔24-38 days with each new
cycle within 7-9 days of the last
normal menstrual volume -Correct Answer ✔5-80 ml
normal length of menstruation -Correct Answer ✔4.5-8 days
what happens during follicular phase -Correct Answer ✔hypothalamus releases
gonadotropin releasing hormone
anterior pituitary releases FSH and LH
follicles start developing
estrogen increases
one follicle dominates and produces more estrogen
other follicles go through atresia
estrogen and LH levels peak 24 hrs before ovulation
NU664D
, NU664D
ovulation occurs
when does the luteal phase begin -Correct Answer ✔with ovulation
what happens in the luteal phase -Correct Answer ✔shift from estrogen to
progesterone dominance
follicle ruptures
corpus luteum forms
progesterone is produced
the follicle ceases growth and endometrium secretes
how long is luteal phase -Correct Answer ✔14 days (14-28)
how long/when is follicular phase -Correct Answer ✔days 1-14
what triggers end of luteal phase and beginning of menses? -Correct Answer
✔drop in progesterone (and estrogen too but less important)
what do estrogen levels do throughout follicular and luteal phases? -Correct
Answer ✔surges with ovulation (end of follicular phase and beginning of luteal
phase)
what happens to the egg at the end of luteal phase and how long after ovulation
does this change take place? -Correct Answer ✔corpus luteum turns into corpus
albicans approx 9-11 days after ovulation
what phase of the uterine cycle corresponds with the follicular phase of the ovarian
cycle? -Correct Answer ✔proliferative phase same time as follicular phase
what is happening to endometrium during proliferative phase and why? -Correct
Answer ✔surge in estrogen thickens endometrial lining to prepare for pregnancy
also forms progesterone receptors to increase endometrial blood flow
NU664D
