Some advantages of blended learning, particularly at a Kindergarten to grade 12 level of education, can be found under the general concept of educational technology. It is also one of the most effective ways for Personalized learning at scale.
The length of a human pregnancy can vary naturally by as much as five weeks. Credit: Â© Jessmine / Fotolia. The length of a human pregnancy can vary naturally by as much as five weeks, according to research published online August 7 in the journal Human Reproduction. Normally, women are given a date for the likely delivery of their baby that is calculated as 280 days after the onset of their last menstrual period.
Weeks of pregnancy: It takes 266 days, or 38 weeks to bear a normal child from the date of conceiving to delivery. Since the majority of pregnant women is not aware of the date of impregnation, it is taken as the date of their last periods. This term lasts 280 days or 40 weeks. A pregnancy normally develops 38 weeks though gynecologists take it as 40-week period assuming that a pregnancy starts from the first day when their cycle began. The fetus is 2 weeks younger than the obstetricians believe. These 40 weeks are classified into 3 trimesters.