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The time period is most often represented compactly as a number of months, followed by the letter "M", as in "36M" or "36 M" for a period of thirty-six months ...
In obstetrics, gestational age is a measure of the age of a pregnancy taken from the beginning of the woman's last menstrual period (LMP), [1] or the corresponding age of the gestation as estimated by a more accurate method, if available.
There is a positive relationship between mass at birth and length of gestation in eutherian mammals. [17] Larger mammals are more likely to produce a well-developed neonate than small mammals.
A month is a unit of time, used with calendars, that is approximately as long as a natural phase cycle of the Moon; the words month and Moon are cognates.The traditional concept of months arose with the cycle of Moon phases; such lunar months ("lunations") are synodic months and last approximately 29.53 days, making for roughly 12.37 such months in one Earth year.
Human pregnancy can be divided into three trimesters, each approximately three months long: the first, second, and third trimester. The first trimester is from the last menstrual period through the 13th week, the second trimester is 14th–28/29th week, and the third trimester is 29/30th–42nd week. [6]
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In low risk pregnancies, most health care providers approve flying until about 36 weeks of gestational age. [146] Most airlines allow pregnant women to fly short distances at less than 36 weeks, and long distances at less than 32 weeks. [147] Many airlines require a doctor's note that approves flying, especially at over 28 weeks. [147]
Consider a couple, each making $60,000, for a total gross income of $120,000 annually (or $10,000 per month). According to the 28/36 rule, they shouldn’t spend more than $2,800 on housing ...