what is a trimester?

Question

sorry i sound really stupid and i know i should know this thanks

Answer 1

A trimester occurs every 3 months of pregnancy.

1st trimester is weeks 1-13
2nd trimester is weeks 14-26
3rd trimester is weeks 27-40

Answer 2

Tri means 3. Just like a triangle has 3 sides. A full term pregnancy is 9 months long. This breaks down into 3 periods of 3 months each and these are called the trimesters. So from 1 to 3 months pregnant is your first trimester, from 4 to 6 months is your second trimester, and 7 to 9 months is the third trimester.

Answer 3

The pregnancy is separated into three parts, each called a trimester and each being about 13 1/3 weeks as the pregnancy is 40 calendar weeks from the first day of your last period to the expected due date.

This is also 10 lunar months or about 9 calendar months (give or take two weeks) :)

So if you're 8 weeks pregnant, you're said to be "in your first trimester" where by 20 weeks you'd be "in your second trimester" and by the time you're huge you're "in your third trimester."

Answer 4

Trimesters divide the human gestation period into three periods of three months. The entire gestation period lasts for a duration of approximately 40 weeks, between the time of the last menstrual cycle and delivery

* The first trimester is the period of time from the first day of the last menstrual period through 12 weeks of gestation. It is during this period that the embryo undergoes most of its early structural development. Most miscarriages occur during this period.
* The second trimester is the period of time extending from the 13th to the 27th week of gestation. During this period the embryo, now known as a fetus, is recognizable as human in form, but is not developed enough to be viable if born.
* The third trimester is the period of time extending from the 28th week of gestation to delivery. It is during this period that the fetus reaches viability, and may survive if born prematurely.

The use of modern medical intensive care technology has greatly increased the probability of premature babies living, and has pushed back the boundary of viability to much earlier dates than would be possible without intensive medical assistance. In spite of these developments, premature birth remains a major threat to the fetus, and may result in ill-health in later life, even if the fetus survives the birth and subsequent intensive care.

The actual boundaries of when an embryo is regarded as a fetus or a fetus becomes regarded as potentially viable depend on the definitions of these terms, and do not necessarily fit neatly on the classic trimester boundaries. Note also that these boundaries are the matter of both medical and political controversy.

Some timings that have been used are:

* embryo to fetus: eight weeks
* the edge of viability: 22 - 25 weeks (note the risk of death or disability, see the reference cited below).

Nevertheless, the concept of pregnancy as divided into three trimesters continues to be used in practical healthcare.

Answer 5

Wow. This is really sad. A trimester is 3 months.

Answer 6

3 months

Answer 7

3 months

Answer 8

A trimester is 3months long as for as weeks it is about 12 weeks long unless the are five weeks in a month.

Answer 9

a period of 3 months.
tri = 3
mester = month period

kind of like semester = 6 months (back in the old days, a college semester laster 1/2 the year)

Answer 10

3 months.