Which one is the most likely reason of not occurring regular menstrual...
The most likely root cause why menstruation is not taking place in regularly cycling human females is the fertilization of the ovum.
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Which one is the most likely reason of not occurring regular menstrual...
Reason for not occurring regular menstrual cycle:
Fertilization of ovum:
When fertilization of the ovum occurs, it leads to the formation of a zygote which eventually develops into an embryo. This embryo will then implant itself into the endometrial lining of the uterus, leading to pregnancy. As a result, the regular menstrual cycle will be interrupted as there is no shedding of the endometrial lining.
Retention of corpus luteum:
The corpus luteum is a temporary endocrine structure in the ovary that forms after ovulation. It secretes hormones such as progesterone which helps maintain the endometrial lining. If the corpus luteum is retained due to certain conditions, it can lead to the absence of menstruation.
Maintenance of hypertropical endometrial lining:
In some cases, the endometrial lining may become hypertrophied or thickened, which can prevent the shedding process that occurs during menstruation. This could be due to hormonal imbalances or other underlying health issues.
Maintenance of high concentration of sex hormones:
High levels of sex hormones such as estrogen and progesterone can also disrupt the regular menstrual cycle. These hormones play a crucial role in regulating the menstrual cycle, and any abnormalities in their levels can lead to irregularities in menstruation.
Overall, the most likely reason for not occurring a regular menstrual cycle is the fertilization of the ovum, as it leads to pregnancy and interrupts the normal shedding of the endometrial lining.