Tag: menstruation in females

Progesterone is a hormone which is secreted by the corpus luteum. It is responsible for the maintenance of the endometrium of the uterus. As long as the progesterone is secreted by the corpus luteum, the menses does not begin. When the corpus luteum degenerates in the absence of a fertilization event, the progesterone secretion stops and the endometrium starts to break down and menses begin. So, in order to delay the menses, intake of progesterone will be advised because it will prevent the break down of endometrium and menses will not occur.

The release of the first menstrual flow or period is called menarche. It marks the beginning of a female's reproductive life and is one of the most obvious signals of the onset of puberty. Menarche usually occurs between the age of 11-14 years. While Menopause is the condition in which menstrual cycle stops naturally in women. 

This is usually about 14 days after the first day of your last period if your cycle is around 28 days long. An egg lives for about 12-24 hours after being released. For pregnancy to happen, the egg must be fertilized by sperm within this time. Sperm can live for up to 7 days inside a woman's body.

Menstruation is a woman's monthly bleeding. It occurs so as to shed the lining of the uterus or womb.
In menstrual cycle, the uterus gets prepared for implantation and the endometrium builds up, After ovulation, if the egg released does not gets implanted in the uterus, it leads to shedding off this endometrium and its lining and this is called as menstruation,
Thus, the correct answer is option B.

The rhythmic reproductive cycle in the female primates is called as the menstrual cycle. The first menstruation begins at puberty and is called as menarche and is repeated at an average interval of about 28 / 29 days.

The reproductive cycle in the female primates is called menstrual cycle. The first menstruation begins at puberty and is called as menarche. In human females, menstruation is repeated at an interval of about 28/29 days, and the cycle of events starting from one menstruation till the next one is called as the menstrual cycle. In human beings, menstrual cycle ceases around 50 years of age; that is termed as menopause. 

The reproductive cycle in the female primates (e.g., monkeys, apes and human beings) is called as menstrual cycle. The first menstruation begins at puberty and is called as menarche. In human females, menstruation is repeated at an average interval of about 28/29 days, and the cycle of events starting from one menstruation till the next one is called as the menstrual cycle. One ovum is released (ovulation) during the middle of each menstrual cycle.

All the statements above are correct except the last one. Menstrual blood normally does not clots and flows through cervix and vagina along with inner lining of uterus. But it may clot also especially if there is blockage in cervix and free flow is obstructed. The menstrual blood contains not only blood but also tissue from the lining of the uterus. Clots are a natural way of controlling bleeding. Scientifically, it is a complicated and involved process that leads to fibrin being formed into a matrix. 
On the exposed parts of body like scraped knee, this mechanism leads to scab formation. But inside the uterus, the process results in a clot. Because blood in the uterus is mixed with many other cells and endometrial tissue, there is a difference between this clot and those seen on the skin. Whenever blood pools or is retained inside the uterus it is likely to clot. When menstrual blood and cells pass immediately outside the body, clots are less likely. As a general rule, the redder the blood is, the faster it has reached the outside. The blacker it is, the longer it took to exit the body. If the blood is accumulating faster than the body's ability to transfer it out of the uterus, clots are the result. Many women routinely have some clotting during menses. Factors that determine whether clots will occur include: the size of the uterus, the ability of the uterine myometrium (muscle) to contract, fibroids, adenomyosis, the diameter of the cervical canal through which the blood must flow, any obstruction to the outflow of menstrual products such as polyps, adhesions, etc.