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.
The length of human pregnancies can vary by up to five weeks, according to new research published Wednesday, with the average pregnancy lasting 38 weeks among study subjects. The length of human pregnancies can vary by up to five weeks, according to new research published Wednesday, with the average pregnancy lasting 38 weeks among study subjects. The research, published in the online edition of the journal Human Reproduction, found that natural pregnancies where the conception date was known varied in length by 37 days. The median time from conception to birth was 268 days, or 38 weeks and two days.