What is the typical duration of menstruation?
1–3 days
3–7 days
7–10 days
10–14 days
The Correct Answer is B
Menstruation marks the beginning of the menstrual cycle and involves the shedding of the functional layer of the endometrium due to the decline of progesterone and estrogen. It is triggered by corpus luteum regression in the absence of fertilization. Normal menstrual bleeding lasts 3–7 days, with average blood loss between 30–80 mL. Levels of FSH (3–20 IU/L) begin to rise to recruit new follicles for the next cycle. Prostaglandins are released, causing vasoconstriction and myometrial contractions, leading to menstrual cramps and tissue expulsion.
Rationale for correct answer
B. The normal duration of menstruation is 3–7 days. This range is physiologically typical and supported by stable hormone withdrawal patterns and normal endometrial responses.
Rationale for incorrect answers
A. A duration of 1–3 days is shorter than the normal range and may indicate hypomenorrhea or hormonal insufficiency, though still considered normal if consistent and asymptomatic.
C. Bleeding for 7–10 days exceeds the upper normal limit and may suggest menorrhagia or coagulation abnormalities, requiring evaluation.
D. A menstrual duration of 10–14 days is abnormal and often pathological. It may suggest hormonal imbalance, fibroids, endometrial hyperplasia, or bleeding disorders.
Take home points
- Normal menstruation lasts 3–7 days with 30–80 mL blood loss.
- Bleeding <3 days or >7 days may indicate hormonal or structural pathology.
- Menstruation occurs due to hormonal withdrawal after corpus luteum regression.
- Prostaglandins play a role in endometrial shedding and cramping.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B"]
Explanation
The anterior pituitary secretes follicle-stimulating hormone (FSH) and luteinizing hormone (LH), two key gonadotropins that regulate the ovarian cycle and control the secretion of ovarian hormones (estrogen and progesterone). FSH (normal: 3–20 IU/L) promotes follicular growth and estrogen production during the follicular phase, while LH (normal: 5–20 IU/L) triggers ovulation and stimulates the formation and function of the corpus luteum during the luteal phase. Their secretion is stimulated by GnRH from the hypothalamus in a pulsatile manner.
Rationale for correct answers
A. FSH is secreted by the anterior pituitary and stimulates the growth and maturation of ovarian follicles and the synthesis of estradiol by granulosa cells.
B. LH is also released from the anterior pituitary and is responsible for triggering ovulation and maintaining the corpus luteum, which secretes progesterone during the luteal phase.
Rationale for incorrect answers
C. GnRH is not secreted by the anterior pituitary—it is secreted by the hypothalamus and acts on the anterior pituitary to stimulate the release of FSH and LH.
D. Estrogen is produced by granulosa cells of the ovarian follicles, not by the anterior pituitary. Its secretion is regulated by FSH.
E. Progesterone is secreted by the corpus luteum in the ovary after ovulation. It is not an anterior pituitary hormone.
Take home points
- FSH and LH are the two anterior pituitary hormones that regulate the menstrual cycle.
- GnRH is from the hypothalamus, not the anterior pituitary.
- Estrogen and progesterone are secreted by the ovaries under pituitary control.
- Pituitary hormones initiate and regulate ovulation and corpus luteum function.
Correct Answer is ["A","B","C","D"]
Explanation
Menstrual phase of the uterine cycle The menstrual phase marks the beginning of the uterine cycle and is initiated by a sudden drop in estrogen and progesterone levels due to corpus luteum regression in the absence of implantation. This hormonal decline leads to vasoconstriction of spiral arteries, ischemia, and shedding of the functional layer of the endometrium. Normal menstrual flow lasts 3–5 days, and blood loss averages 30–40 mL. Spiral artery spasms result in tissue necrosis, and rising estrogen levels only commence after menstruation is complete.
Rationale for correct answers
A. The withdrawal of estrogen and progesterone at the end of the luteal phase triggers endometrial breakdown and onset of menstrual bleeding.
B. The functional layer of the endometrium undergoes necrosis and is shed through the cervix and vagina as menstrual fluid.
C. Spiral arteries undergo intense vasoconstriction, leading to ischemia and necrosis of the endometrium, which causes menstruation.
D. The menstrual phase typically spans Days 1 to 5 of the cycle, marking the beginning of the uterine cycle before follicular estrogen rise.
Rationale for incorrect answers
E. Rising estrogen levels occur during the proliferative phase, which begins after menstruation. The menstrual phase is marked by low estrogen and progesterone levels.
Take home points
- Menstrual phase starts with progesterone and estrogen withdrawal.
- Endometrial shedding is due to spiral artery ischemia.
- Menstrual flow usually lasts 3–5 days.
- Rising estrogen levels define the proliferative phase, not the menstrual phase.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.