The barn types discussed here are only some of the barns that have figuredin the history of American agriculture. As with Dutch barns, some reflectthe traditions of the people who built them: Finnish log barns in Idaho,Czech and German-Russian house barns in South Dakota, and threebayEnglish barns in the northeast.
The 280 days is full term plus 2 weeks prior to ovulation--when you weren't even pregnant. If you go by the 40 weeks (280 days) the prior poster is right. The math would be 13.3 weeks and you would be in your third about 27 weeks. If you go by 266 days, you would be starting your third trimester in the 25th week. So, docs go between 25-28 weeks for that reason. Why any doc would ever say that the third trimester starts in the 30th week is beyond me. That is weeks late by either way.
Hereâs the most common breakdown, along with official weeks from the American Congress of Obstetricians and Gynecologists: First Trimester: 0 weeksâ13 and 6/7 weeks (Months 1â3) Starts with the first day of your last menstrual period (LMP) and ends with the last day of the 13th week thereafter. During your last period (which will be your last for a while), your uterus is preparing for ovulation and your body is gearing up for pregnancy, so technically, you can start counting from this point. Second Trimester: 14 and 0/7 weeksâ27 and 6/7 weeks (Months 4 â7) Starts at the beginning of the 14th week after your LMP and lasts through the 27th week of pregnancy. Third Trimester: 28 and 0/7 weeksâ 40 and 6/7 weeks (Months 7â9) Starts at the beginning of the 28th week after your LMP and ends with labor.