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.
Childbirth during 38-40 weeks of pregnancy is considered as normal but a baby born before 37 weeks is considered as 'premature'. Human gestation period can be anywhere between 259 to 294 days. During pregnancy, doctors check whether the size of the head, abdomen, thigh bone, etc. is according to the gestational age.