Shhhhh. I'm On Period

The LMP (Last Menstruation Period) is not the real beginning of a pregnancy, but serves as a reference point to determine the date of ovulation and thus the time of fertilization. According to some estimates, the intended structures of the human body such as the uterus, ovaries, cervix and ovaries are already established and can be distinguished during the embryonic period. During the fetal period (organogenesis), the organs that form during this embryonic period grow and differentiate.

For many women, the length of the cycle and the amount of blood shed is the same for both cycles, but for some it can vary between 21 and 40 days. The average duration of a cycle is 28 days and usually occurs 14 days after the start of menstruation. For some women, the average duration of their menstrual cycle can vary greatly over time, varying between 20 and 30 days, and for others between 14 and 20 days or more.

It is not uncommon to have irregular periods of up to 6 years, especially when a woman's body is preparing for the menopause.

There are a number of emotional, psychological and physical symptoms associated with a woman's menstrual cycle. Some of these are physical, such as menstrual cramps, headaches, fatigue, nausea, dizziness, irritability and exhaustion. These can be due to hormonal changes in the body, hormonal imbalances or a combination of all.

Some of these symptoms will improve when the period begins and the woman begins to shed blood, but will have completely disappeared by the end of the period.

In some cases, women bleed in the first few days of their period, but not long enough to cause serious problems.

One way to find out if you have problems with your menstrual cycle is to track your period and record the number of days you are bleeding. Also note if you have a stain period or not, as well as the duration of the bleeding. In addition to long periods of menstruation, experts say bleeding gums, headaches, nausea, vomiting, diarrhea, abdominal pain and menstrual discomfort can occur.

Charlery-White says she suffered severe menstrual bleeding during her pregnancy, though it rarely lasted as long as five years. Fortunately, she finally found a blood product to keep the bleeding at bay and, at 27, she now has a normal period for the first time.

The menstrual blood that leaves the body is the product that is released from the uterus through the endometrium, also called endometrium. The menstrual cycle lasts approximately two weeks after the beginning of a woman's next menstrual period, until the next cycle. If no fertilization takes place, the menstrual bleeding stops and the menstruation continues. Pregnancy occurs when an egg or oocyte released by the woman about halfway through her menstrual cycle is fertilized. At this point in the cycle, the uterine lining is "degraded," marking the beginning of her next menstrual period.

The menstrual cycle refers to the cycle in which a woman's uterus grows and sheds the lining of the endometrium, which could support the development of a fertilized egg. On average, menstruation occurs in women at the age of 13, known as menarches, and continues until the age of 51, an age known as menopause.

Women generally forget about their period for 28 days, but the duration of the cycle can be longer for some women than for others, such as women in their late teens or early 20s. A woman's first menstruation, usually between the ages of 13 and 18, typically takes place in a 28-day cycle.

Excluding the six premature births, we found that the duration of pregnancy varied by up to 37 days for women between the ages of 18 and 24, with an average of 38 days.

We know that the length of pregnancy can naturally vary, but part of this variation has always been attributed to errors in the classification of gestational age. It is impossible to discern the difference between calculation errors and natural variability in order to be sure that we accurately measure pregnancies and the age of developing fetuses. The five-week variability is still within normal variability for women between 18 and 24 weeks. Women fluctuate up to 37 days during pregnancy, with an average period of fluctuation of 38 days, and we have always attributed some or all of these fluctuations to the error of assigning gestational age. But our measure of pregnancy length does not include this source of error.

Caution should be exercised when calculating the duration of pregnancy and the age of developing fetuses for women between 18 and 24 weeks, as the time of ovulation can vary and depends on many factors related to the environment and psychological aspects.

The temporal index (i.e. PW) refers to the moment of fertilization, while in practical obstetrics the time after the LMP is used for the calculation. The foetus takes on typical human features, although the head is still relatively large at the end of the first trimester. Ears and nasal saddles are performed, the eyes are moved forward and ears, nasal saddles etc. are inserted.

Cited Sources:

https://www.sciencedaily.com/releases/2013/08/130806203327.htm 
https://www.healthline.com/health/womens-health/stages-of-menstrual-cycle 
https://healthengine.com.au/info/menstruation-period-or-menstrual-cycle 
https://www.glamour.com/story/period-for-years 
https://www.medicalnewstoday.com/articles/154699 
http://www.embryology.ch/anglais/jfetalperiod/entwicklung01.html