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.
As you begin the third trimester, your health care provider or midwife may change the schedule of your prenatal visits from monthly to every two weeks. Itâs a good idea to start taking childbirth classes in preparation for your babyâs birth, especially if this is your first pregnancy.