Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female? [2009]

a)
Maintenance of the hypertrophical endometrial lining

b)
Fertilisation of the ovum

c)
Retention of well -developed corpus luteum

d)
Maintenance of high concentration of sex hormones in the blood stream

Correct answer is option 'D'. Can you explain this answer?

Question

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female? [2009]

a)
Maintenance of the hypertrophical endometrial lining
b)
Fertilisation of the ovum
c)
Retention of well -developed corpus luteum
d)
Maintenance of high concentration of sex hormones in the blood stream

Correct answer is option 'D'. Can you explain this answer?

Answer

Graffian follicle will become corpus luteum and secrets progesterone.it maintain the endometrium. but when ovum is not fertilizerd , corpus luteum desintergrate progesterone release get stopped and endometrium breaks and menstruation starts.
so when ovum get fertilizered , no menustration.

Answer

Is b correct option

Answer

Hey buddy this is your and
it is irregular because of some medicines which leads to
hormonal imbalance again due to high or low body temperature or blood pressure also due to exercising too much or having high or low body weight it menstruation is irregular

Answer

D - Fertilisation of the ovum

Menstruation is a part of the menstrual cycle, which is a natural process that occurs in the reproductive system of human females. It involves the shedding of the uterine lining, known as the endometrium, which occurs when fertilization of the ovum does not take place.

Explanation:
The menstrual cycle is regulated by hormonal changes that occur in the female body. The cycle is divided into several phases, including the follicular phase, ovulation, and the luteal phase. The release of hormones, such as follicle stimulating hormone (FSH) and luteinizing hormone (LH), play a crucial role in regulating the menstrual cycle.

- Follicular phase: This phase begins on the first day of menstruation and lasts until ovulation. During this phase, FSH stimulates the development of follicles in the ovaries. These follicles contain immature eggs, also known as ova.

- Ovulation: Ovulation occurs when a mature egg is released from one of the follicles in the ovary. This process is triggered by a surge in LH levels, which causes the follicle to rupture and release the egg. The egg then travels down the fallopian tube, where it can potentially be fertilized by sperm.

- Luteal phase: After ovulation, the ruptured follicle transforms into a structure called the corpus luteum. The corpus luteum produces hormones, such as progesterone, which help prepare the uterus for pregnancy. If fertilization of the egg occurs, the resulting embryo implants itself into the uterine lining. However, if fertilization does not occur, the corpus luteum eventually degenerates, leading to a decrease in hormone levels.

Role of fertilization:
Fertilization of the ovum is the process in which a sperm cell fuses with the egg cell, resulting in the formation of a zygote. If fertilization takes place, the zygote will implant itself into the uterine lining, and pregnancy will occur. In this case, menstruation does not take place because the uterine lining is not shed.

If fertilization does not occur, the corpus luteum undergoes degeneration, leading to a decrease in hormone levels. This decrease in hormone levels triggers the shedding of the uterine lining, resulting in menstruation. Therefore, the absence of fertilization is the most likely root cause for menstruation not taking place in a regularly cycling human female.

In conclusion, option D - Fertilization of the ovum is the correct answer.

Answer

B

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